The Drylining Solutions Selector

The Drylining 

Solutions Selector 

PLASTERBOARD 

T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E

Introduction 

GTEC – The dynamic new face 

of Lafarge Plasterboard 

We all know that an innovative company 

always stays one step ahead and continuously 

adapts to the changing market. 

Our customers have told us that our branding 

is unclear. In response, we are delighted 

to present GTEC – the exciting new 

commercial brand from Lafarge. 

GTEC provides a more simplified structure, 

making it easier for customers to source 

and purchase the right Lafarge products 

and systems. 

It brings further clarity to the Lafarge offer, 

delivering confidence along with the Lafarge 

brand to everything we do, symbolising 

highest quality products, recognised technical 

expertise, sustainable initiatives such as our 

waste offer and excellent customer service, 

all backed by the peace of mind delivered 

by the Lafarge GTEC System Warranty. 

From April onwards GTEC will be launched 

into the marketplace, bringing a fresh new 

look to our packaging, point of sale material, 

literature and merchandising reinforcing the 

quality and service you receive from Lafarge. 

The launch of the GTEC Commercial 

brand will result in the renaming of our 

product range. 

For example Lafarge Cormet C Stud 

will now be GTEC C Stud. 

A detailed product comparison table is 

available from Literatureline on 

0 75 77 58 . 

Standard 

Specialist 

Performance 

EXAMPLE: 

GTEC Fire Board 

MASTERBRAND 

COMMERCIAL BRAND 

COMMERCIAL RANGES 

BOARD 

FINISH 

Jointing Compounds 

Joint Tapes 

Beads 

Sealers 

Textures 

Cove 

Cove Adhesive 

Profiles 

Tools 

EXAMPLE: 

GTEC Joint Filler (previously Fast Set) 

Studs 

Tracks 

Channels 

Angles 

Accessories 

EXAMPLE: 

GTEC C Stud 

Adhesives 

Renders 

Drywall Screws 

Nails 

FRAME 

FIX 

EXAMPLE: 

GTEC Bonding Compound 

Introduction 

Lafarge Plasterboard is the gypsum division 

of the Lafarge Group, a world leader in the 

manufacture and supply of building materials. 

Lafarge GTEC Plasterboard Drywall Systems 

provide economic, high performance options 

to meet a wide range of building requirements. 

They are ideally suited to today’s fast-track 

construction schedules, which must control 

costs whilst maintaining the highest quality 

standards. Our plasterboard range and 

drywall systems meet the practical and 

performance needs of all new-build and 

refurbishment projects. 

Specialist Help 

Lafarge Technical Enquiryline 

This unique service combines the skills of our 

Technical Advisors with advanced computer 

and CAD systems to provide fast answers to all 

your drywall specification, performance and 

installation enquiries. 

T. 0 75 77789 

F. 0 75 77456 

E. enquiryline@lafarge-gypsum.lafarge.com 

Call Literatureline on 0 75 7758 for your 

free copy of the GTEC Installation Handbook 

and to discuss further training opportunities. 

P A G E | L A F A R G E | T H E D R Y L I N I N G S O L U T I O N S E L E C T O R T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 

Introduction

How to use this booklet 

How to use this booklet 

This guide is designed as a quick and simple reference to the wide range 

of Lafarge plasterboard products and drywall systems available. We have 

also included some handy tips to help you when the job is underway. 

BOARD 

GTEC Plasterboard Range 6 

An introduction to the full range of standard 

and performance plasterboards to suit a variety 

of building needs, including an easy to use 

Plasterboard Selector guide. 

An introduction to the range of taping and jointing 

products and methods, including details of Premier 

Taping Tools. 

Drylining Solutions 

FINISH FIX 

Introducing the range of Lafarge GTEC 

Drywall Systems: 

Floors & Ceilings 4 

Wall Linings 8 

Partitions 5 

GTEC Finishing Range 64 GTEC Fixing Range 74 

An introduction to the range of GTEC Fixings. 

Including details on choosing the right screws for 

each application. 

GTEC Deco System 76 Part E 78 

An introduction to the unique pre-sealed GTEC Deco 

plasterboard, fixings and finishings. 

Part L 9 

Find the likely U-value requirements under the Part L 

Regulation 2006. 

Find out what you need to know as well as 

recommended solutions for walls, ceilings and floors. 

An easy to use Plasterboard Selector pull-out section can be found at the back of this booklet on page 96. 

Get in training for the year ahead – full details on training courses on page 97. 

P A G E 4 | L A F A R G E | T H E D R Y L I N I N G S O L U T I O N S E L E C T O R T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 5 

How to use this booklet

The Plasterboard Range 

BOARD 

The GTEC Board Range 

Lafarge offers a wide range of standard plasterboards and high performance 

plasterboards for all your drylining needs, providing higher levels of 

protection against impact, sound, moisture and fire. 

Standard Plasterboards 

Key: 

Internal Wall 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Standard Board 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR GTEC Plank 

✔ 

R 

✔ NR Partition ✔ 

• Ivory face is suitable for seamless jointing 

• Ivory face is suitable for the application of gypsum skim plasters 

• Available in a variety of lengths from 1800mm to 3600mm 

• Available in 900mm and 1200mm widths 

• Provided in thicknesses of 9.5mm, 12.5mm and 15mm 

GTEC Plank has one ivory face available with either a tapered edge 

or square edge profile and a grey faced back liner. 

• Available in a 2400mm length 

• Available in a 600mm width 

• Provided in a thickness of 19.0mm 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Contour 

Used for curved walls and ceilings. 



• Provided in a thickness of 6mm 

R 

✔ NR Ceiling ✔ 

R 

✔ NR R 

✔ ✔ NR R 

Floor ✔ ✔ NR Shaft ✔ 

R 

✔ NR Residential ✔ 

R ✔ NR ✔ Non-Residential Key: 

Performance Plasterboards 


Internal Wall 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR GTEC Vapour Board 

✔ 

R 


Used as a lining where there is a risk of condensation. The board has 

a metallised film bonded to one face which acts as a vapour control 

layer and can also give improved thermal performance in some 

circumstances. 

• Vapour Board film can be applied to most plasterboards 



• Provided in thicknesses of 9.5mm, 12.5mm and 15mm 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Moisture Board 

Silicone wax treated plasterboard for use in bathrooms, kitchens and 

garages – resistant to the effects of moisture and humidity. Also an 

ideal base for ceramic tiling. 



• Provided in thicknesses of 12.5mm and 15mm 

• Available with additional fire and sound properties 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR GTEC Fire Board 

✔ 

Used where high levels of fire resistance are required. The pink 

face is suitable for direct decoration. 




R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC E Board 

A 10 kg/m² plasterboard that meets the requirements of the Building 

Regulations Approved Document E. 

• Available in lengths of 2400mm and 2700mm 



R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC dB Board 

Dense plasterboard to improve sound insulation for separating walls 

and ceilings. 




R 


R 

✔ NR R 

✔ ✔ NR R 


R 


R ✔ NR ✔ Non-Residential 

The Plasterboard Range

The Plasterboard Range 

Key: 

Internal Wall 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Acoustic Homespan Board 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR GTEC Thermal Board 

✔ 

R 


GTEC Acoustic Homespan Board has one decorative ivory face 

available with either a tapered edge or square edge profile and a 

grey faced back liner suitable for the construction of the Lafarge 

GTEC Acoustic Homespan system. 




R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Universal Board 

A heavy duty, multi-purpose impact resistant plasterboard used in 

high traffic areas, such as corridors and hospitals etc. 




(previously Multicheck Wallboard) 

A tapered edge, white faced plasterboard bonded to expanded 

polystyrene. Available with a vapour board membrane to order. 



• Provided in thicknesses of 22mm to 50mm 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Thermal XP Board 

A tapered edge, blue faced plasterboard bonded to extruded 

polystyrene. Available with a vapour board membrane to order. 




R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Thermal K Board 

A tapered edge, peach faced plasterboard, bonded to phenolic foam 

to give the ultimate performance. A vapour control layer is provided 

as standard. 




R 


R 

✔ NR R 

✔ ✔ NR R 


R 


R ✔ NR ✔ Non-Residential Key: 

Specialist Plasterboards 

GTEC Pregybel 

GTEC Pregybel is a range of perforated plasterboards which combine 

sound absorption performance with an aesthetic design. GTEC 

Pregybel is mainly used in ceiling applications in retail centres, 

offices, apartments, hospitals, schools, showrooms, auditoriums, 

cinemas and galleries to provide a high quality environment. 




NEW PRODUCT 

NEW PRODUCT 


Internal Wall 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Megadeco 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ 

R 


GTEC Megadeco has one decorative pre-sealed white face with 

tapered edges and a grey faced back liner, suitable for drylining 

systems that require superior acoustic, fire and impact performance. 


and 1200mm width 


R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Hydrodeco 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ 

GTEC Hydrodeco has one decorative white face with tapered edges 

and a green faced back liner, suitable for drylining systems that 

require superior moisture resistance such as bathrooms. 




GTEC Aqua Board 

Superior fire, sound insulation and impact resistance. Ideal as a tile 

backer for bathrooms, laundries and shower rooms and for wet areas 

such as swimming pools and plant rooms 

• Available in a 2400mm and 2700mm length 



Synia 

• Synia is a unique plaster board design which, once fixed, reveals 

a four tapered edges for the ultimate flat ceiling. 




R 


R 

✔ NR R 

✔ ✔ NR R 


R 



The Plasterboard Range

Plasterboard Selector 

A comprehensive range 

of plasterboards to meet 

all applications 

The GTEC Board Selector is also shown as a pull-out section at the back of this booklet. 

See Page: 6 7 6 7 7 7 7 8 8 8 9 9 

GTEC 

Standard Board 

Tapered or square 

edges available 

in a wide 

range of sizes 

GTEC 

Vapour Board 

Vapour control 

lining for ceilings 

and external walls 

BS EN 14190 

GTEC 

Plank 

19mm board for 

walls, ceilings and 

partitions 

GTEC 

Moisture Board 

Use in bathrooms, 

kitchens and high 

moisture areas 

GTEC 

Fire Board 

When you need 

high levels of 

fire protection 

GTEC 

E Board 

Designed for 

use in dwellings 

as defined 

by Approved 

Document E 

Regulations 

GTEC 

dB Board 

Superior acoustic 

performance 

GTEC 

Acoustic 

Homespan 

Board 

Superior acoustic 

performance 

GTEC 

Universal 

Board 

Multi-purpose, 

combining 

fire sound 

and impact 

resistance 

GTEC 

Thermal Board 

Bonded to 

different types 

of insulation 

to suit a variety 

of thermal 

requirements 

BS EN 13950 

GTEC 

Aqua Board 

Water and 

mould resistant. 

Used in wet 

and high 

humidity areas 

BS EN 5 0 : 005 Type A N/A A H1 D, F D D, I D D, F, I, R N/A A D, F, I, R 

BS 0: 985 Type 1 1 1 3&4 5 1 1 1 5 N/A 1 5 

WALL Linings 

GTEC Direct Bond ✓ ✘ ✘ ✘ ✓ ✓ ✓ ✓ * 

GTEC Dryliner ✓ ✓ ✘ ✓ ✓ ✓ ✓ ✓ * 

GTEC Independent Wall Lining ✓ ✓ ✘ ✓ ✓ ✓ ✓ ✓ * 

GTEC Linings to Timber Frame ✓ ✓ ✓ * 

PArtitions 

BOARD 

GTEC Board Selector 

✘ ✓ ** 

GTEC 

Megadeco 

Fire, sound 

and impact 

resistance with 

one decorative 

white face with 

a colour matched 

jointing system 

✘ ✓ * 

✓ ✓ ✓ ✓ 

✓ ✓ ✓ ✓ 

✓ ✓ ✓ ✓ ✘ ✓ ✓ ✓ ✓ 

GTEC Metal Stud Partitions ✓ ✘ ✓ ✓ ✓ ✓ ✓ ✓ * 

✓ ✘ ✓ ✓ 

GTEC Acoustic Homespan ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✓ ✘ ✘ ✘ ✘ 

GTEC Timber Stud Partitions ✓ ✘ ✓ ✓ ✓ ✓ ✓ ✘ ✓ ✘ ✘ ✓ 

FLoors & CeiLings 

GTEC Acoustic Floor ✘ ✘ ✓ ✘ ✓ ✘ ✓ ✘ ✓ * 

GTEC Dryliner Ceiling ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✘ ✓ * 

GTEC Suspended MF Ceiling ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✘ ✓ * 

GTEC T-Bar Flat Ceiling & Corridor ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✘ ✓ * 

GTEC Direct to Timber Ceiling ✓ ✓ ✓ * 

meAsurements*** 

✓ ✓ ✓ ✓ ✘ ✓ * 

✘ ✘ ✓ * 

✓ ✓ ✓ 

✓ ✓ ✓ 

✓ ✓ ✓ 

✓ * 

✓ * 

✓ 

Thickness (mm) 9.5, 12.5, 15.0 9.5, 12.5, 15.0 19.0 12.5, 15.0 12.5, 15.0 12.5 12.5, 15.0 15.0 12.5, 15.0 22–70 12.5 12.5, 15.0 

Width (mm) 900, 1200 900, 1200 600 1200 900, 1200 1200 1200 900 1200 1200 1200 1200 

Length (mm) 1800 – 3600 

* Not a typical application. 

** GTEC Universal Bonding Compound must be used. 

*** Not all combinations are available. 

1800, 2350, 2400, 

2700, 3000 

2400 

2400, 

2700, 3000 

1800, 2400, 

2700, 3000 

P A G E 0 | L A F A R G E | T H E D R Y L I N I N G S O L U T I O N S E L E C T O R T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 

2400, 2700 

2400, 

2700, 3000 

1800, 2400 

2500, 2700 

2400, 

2700, 3000 

NEW PRODUCT 

2400 2400, 2700 

2400, 

2700, 3000 

Technical Other technical boards are available: for further details, please contact our Technical Enquiryline on 0 75 77789 

Plasterboard Selector



Floors & Ceilings 

GTEC Acoustic Floor 4 

GTEC Suspended MF Ceiling 

GTEC T-Bar Corridor Ceiling 

A free floating, sound 

insulating floor system for 

structural joist framing. 

Designed as a separating 

floor between and within 

dwellings. Exceptional 

airborne and impact 

resistance. 

Providing a high 

performance ceiling with 

sound insulation and fire 

protection. Lafarge GTEC 

Suspended MF Ceiling 

System can be used to 

upgrade and protect 

existing structures. 

The GTEC T-Bar Corridor 

Ceiling System is unique 

to Lafarge and is the latest 

addition to the ceiling range. 

It has been designed to 

provide the contractor with 

a faster, labour saving, high 

performing one-stop-shop 

ceiling solution. 

NEW PRODUCT 

P A G E | L A F A R G E | T H E D R Y L I N I N G S O L U T I O N S E L E C T O R 

GTEC Dryliner Ceiling 8 

A quick and simple 

system providing high 

levels of fire protection 

and sound reduction and 

accommodating services. 

Providing a flat ceiling 

despite uneven timber joists. 

GTEC T-Bar Flat Ceiling 8 

The GTEC T-Bar Flat Ceiling 

System is unique to Lafarge 

and is the latest addition 

to the ceiling range. It has 

been designed to provide 

the contractor with a 

faster, labour saving, high 

performing one-stop-shop 


NEW PRODUCT 

GTEC Direct to Timber Ceiling 6 

Direct to timber is the 

method for attaching 

plasterboard to the 

underside of timber floor 

joints and roof trusses. 

Wall Linings 

GTEC Direct Bond 8 

GTEC Independent Wall Lining 46 

Partitions 

Used for attaching 

plasterboard and GTEC 

Thermal Board directly onto 

masonry backgrounds. 

A quick and cost effective 

system to install with no 

mechanical fixings required. 

Designed to be installed 

clear of a variety of existing 

backgrounds, allowing 

space for services and for 

high levels of thermal and 

acoustic insulation. 

GTEC Metal Stud Partitions 5 

An economical friction-fit 

system to assemble frames 

for strong, compact, lightweight, 

non-loadbearing 

partitions. Quick to erect, 

light-weight and clean. 

Timber Stud Partitions 6 

Frequently used in 

timber frame houses, in 

small renovation projects 

and home extensions. 

Plasterboard provides a 

ready means of meeting 

Building Regulations in 

respect to sound, thermal 

and fire performance. 

GTEC Dryliner 4 

Suitable for drylining new 

and existing uneven internal 

masonry backgrounds and 

concealing services. A dry, 

quick and cost effective 

system using secure 

mechanical fixings. 

Linings to Timber Frame 50 

Timber frame housing calls 

for a fast, efficient lining 

solution. Plasterboard 

provides a ready means of 

meeting Building Regulations 

in respect to sound, thermal 

and fire performance. 

GTEC Acoustic Homespan 58 

A technically advanced metal 

stud designed to provide 

at least 40 R w dB sound 

performance without the 

requirement of insulation, 

used with GTEC Acoustic 

Homespan Board. 

T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 

Drylining Solutions

Floors & Ceilings: GTEC Acoustic Floor 

GTEC Acoustic Floor 

The Lafarge GTEC Acoustic Floor System is a free-floating, sound 

insulating floor system for structural joist framing, designed as a separating 

floor between and within houses. 

Features & Benefits 

Where to use 

• New-build, conversion and 

improvement work. 

• For the remedial treatment of 

existing floors. 

GTEC Plank 

or GTEC dB Board 

100mm mineral 

wool quilt 

GTEC Acoustic Floor Clip 

Benefits 

• Sound absorption within minimal 

overall thickness. 

• Exceptional airborne and impact 

resistance sound insulation. 

• 60 minutes fire resistance. 

P A G E 4 | L A F A R G E | T H E D R Y L I N I N G S O L U T I O N S E L E C T O R 

GTEC Resilient Tape 

GTEC Metal Angle 

Flooring 

(22mm minimum) 

Ceiling: two layers 

of GTEC Fire Board 

GTEC Resilient 

Bar Deep 

Installation 

Step One 

Place GTEC Acoustic Floor 

Clip over joist and hold 

against joist side. Secure by 

driving the serrated edge of 

the clip into the top of the 

joist with a hammer. 

Space clips either side of the 

joist at 400mm centres. 

Step Two 

Lay GTEC Metal Angle 

with the short leg into the 

clips. GTEC Metal Angle 

joints should be kept to a 

minimum. Where the joins 

occur, butt joint and support 

ends with a clip. Where joists 

are not true, cut Metal Angle 

to suit. 

Step Three 

Cut lengths of GTEC 9mm 

Plank or GTEC 5mm dB 

Board 4mm shorter than 

the space between the 

joists, ensuring you keep 

both bound edges intact. 

Maintaining an even gap 

between board and joist, 

place the boards on the 

GTEC Metal Angle supports 

throughout. 

Step Four 

Fix self adhesive GTEC 

Resilient Tape along the 

length of each joist over the 

GTEC Acoustic Floor Clips 

and along intermediate 

full depth and perimeter 

noggings. 

Step Four 

Lay the flooring across the 

joists at right angles. Tongueand-groove 

chipboard edges 

must be glued with PVA 

wood glue. Leave a 3mm 

gap between flooring and the 

perimeter wall and seal the 

gap with GTEC Intumescent 

Acoustic Sealant before 

skirtings are fitted. Screw fix 

through flooring and boards 

into GTEC Metal Angle using 

GTEC Acoustic Floor screws at 300mm centres. 

Step Six 

The screws, when screwed 

home and countersunk, 

pull the GTEC Metal Angles 

out of the clips to clamp 

the board to the underside 

of the flooring and create 

a completely free-floating 

floor supported on the GTEC 

Resilient Tape. 

For further detailed installation instructions call Literatureline on 0 75 7758 for your 

free copy of the Lafarge GTEC Installation Handbook and to discuss training opportunities. 

T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 5 

Floors & Ceilings: GTEC Acoustic Floor

Floors & Ceilings: GTEC Acoustic Floor 

GTEC Acoustic Floor 

GTEC Metal Accessories 

GTEC Resilient Bar Deep 

Acoustic isolation bar for improving the sound performance and 

minimising the risk of joints cracking due to timber movement during 

the drying out of the timber. 


Metal clip used in the Lafarge GTEC Acoustic Floor system. 


Galvanised versatile metal section used in a number of systems. 


Self adhesive acoustic isolation tape. 

GTEC Intumescent Acoustic Sealant 

Gun applied water based sealant for use as an acoustic sealant, 

resilient adhesive, decorators caulk or as intumescent mastic to seal 

air gaps at system perimeter. NEW - now also available in foil refills. 

Coverage Guide: 32 LM per litre, based on a 6mm bead. 

Shelf Life: 12 months. 

GTEC Fixings 

GTEC Boards 

GTEC Acoustic Floor Self Tapping 

For use with the Lafarge GTEC Acoustic Floor system. 

• Available in a size of 63mm 

• Box quantity 500 screws 

GTEC High Thread 

For fixing GTEC Resilient Bar Deep to ceiling joists. 

• Available in sizes from 32 to 96mm 

• Typical quantities from 200 to 1000 screws 

GTEC Self Tapping 

For fixing plasterboard to light gauge metal, GTEC Resilient Bar Deep 

and ceiling systems. 


• Typical quantities 200–1000 screws 

GTEC Trim Head Self Tapping 

For attaching wood trims to metal with self embedded screws. 


• Typical quantities 500 screws 

The complete range of GTEC fixings are detailed on page 74. 

GTEC Plank 

GTEC Plank has one ivory face available with either a tapered edge 

or square edge profile and a grey faced back liner. 




GTEC dB Board 

Dense plasterboard to improve sound insulation for separating walls 

and ceilings. 





Used where high levels of fire resistance are required. The pink face 

is suitable for direct decoration. 





Floors & Ceilings: GTEC Acoustic Floor

Floors & Ceilings: GTEC Dryliner Ceiling 

GTEC Dryliner Ceiling 

The Lafarge GTEC Dryliner Ceiling system is a simple and quick-dry ceiling 

system, providing high levels of fire protection and sound reduction, and the 

accommodation of services. 


Where to use 

• Any internal application where services 

must be accommodated. 

• To upgrade and protect existing structures. 

GTEC Joist Connector 

GTEC Dryliner Channel 

GTEC Dryliner Track to 

ceiling perimeter 

Joist 

Benefits 

• Can produce a flat ceiling despite uneven 

timber joists. 

• Allows a cavity width of 25mm to 120mm 

with GTEC Joist Connectors or up to 

130mm with GTEC XR Brackets. 

• Suitable for direct decoration or textured 

finish. 

GTEC Channel Connector 


Mineral wool batts 

Installation 

Step One 

Mark position on walls for 

desired clear space/ceiling 

height, taking into account 

the thickness and number of 

layers of plasterboards to be 

used. Fix the GTEC Dryliner 

Track to walls and around 

columns etc at 600mm 

maximum centres. 

Step Two 

Set levels and secure 

the GTEC Dryliner Joist 

Connecter to side of joist, 

on line of the GTEC Dryliner 

Channel with two 32mm 

GTEC High Threads. Ensure 

the GTEC Joist Connectors 

are level and use a maximum 

of 900mm centres for single 

boarding and 600mm 

centres for double boarding. 

Step Three 

Offer one edge of the GTEC 

Dryliner Channel to the 

GTEC Joist Connector. Once 

it is located in the fixing plug, 

push the opposite edge of 

the Channel into position. 

Where necessary extend the 

length of the GTEC Dryliner 

Channel by connecting two 

lengths of the GTEC Dryliner 

Channel together with the 


Connector. 

Step Four 

Cut the GTEC Dryliner 

Channel at maximum 5mm 

shorter than the length of the 

ceiling required and locate 

the GTEC Dryliner Channel 

into the GTEC Dryliner Track. 

Step Five 

Fix plasterboards with the 

long edges at right angles 

to the GTEC Dryliner 

Channels. Screw-fix boards 

to GTEC Dryliner Channels 

at 230mm maximum centres 

and 150mm maximum 

centres at perimeters of 

room and the cut ends of 

board. With two layers of 

plasterboard, stagger all 

joints between layers. 




Floors & Ceilings: GTEC Dryliner Ceiling

Floors & Ceilings: GTEC Dryliner Ceiling 

GTEC Dryliner Ceiling 

GTEC Channel GTEC Fixings 

GTEC Track 



Galvanised steel furring channel for plasterboard fixing. 

It is used in the GTEC Dryliner system. 

GTEC Dryliner Track 

Galvanised metal J shaped section used as a track or perimeter 

channel in the GTEC Dryliner system. 

GTEC Dryliner Channel Connector 

Galvanised clip used to join the GTEC Dryliner Channels. 

GTEC Joist Connector 

Galvanised steel pressed section used to join the GTEC Dryliner 

Channels to timber and used in the GTEC Dryliner Ceiling systems. 

GTEC Standard Reach Bracket 

GTEC Standard Reach Brackets can be used as an alternative to joist 

connectors. Steel section used to brace dryliner channels to substrate 

in the GTEC Dryliner system. Also available as a GTEC XR Bracket. 

GTEC Boards 


For attaching plasterboard to light gauge metal and ceiling systems. 







GTEC Pan Head Self Tapping 

For connecting light gauge metal components. 




GTEC Plasterboards 

GTEC Plasterboard Solutions offer a wide range of standard 

plasterboards and high performance plasterboards for all your drywall 

needs, providing higher levels of protection against impact, sound, 

moisture and fire. 


Floors & Ceilings: GTEC Dryliner Ceiling

Floors & Ceilings: GTEC Suspended MF Ceiling 


The Lafarge GTEC Suspended MF Ceiling System is ideal for commercial 

applications, providing a high performance ceiling with sound insulation 

and fire protection. 


Where to use 

• Where services must be accommodated. 

• To upgrade and protect existing 

structures. 

Benefits 

• Ceiling height may be varied. 

• Suitable for direct decoration. 

GTEC Edge Channel fixed at 

600mm centres 

GTEC Ceiling Channels at 400 or 450mm 

centres, secured by clips to Primary 

Channels 

Note: 

Orientation of GTEC Connecting Clips 

reversed alternatively along GTEC 

Primary Channels* 

Tips 

Suspend heavy loads, air ducting, lighting 

units etc. directly from structural soffit to 

avoid loading of the suspension framing. 

Always alternate GTEC Connecting Clips 

on GTEC Primary Channels.* 

GTEC Soffit cleat 

GTEC Primary Channels 

All hangers should be double screwed 

*if the ceiling weight exceeds 20kg/m 2 or is a double boarded system it is recommended they are screw fixed. 


Minimum 150mm overlap 

GTEC Rigid Angle Hangers at 

1200mm centres along GTEC 

Primary Channel 

MFCSTRAP 25mm strap 

may be used on ceiling 

drops up to 1m deep 

Installation 

Step One 

Mark position on walls for 

finished ceiling height taking 

into account the thickness 

and number of layers of 

plasterboard to be used. Fix 

the GTEC Edge Channels to 

walls at 600mm maximum 

centres. Mark location of the 

GTEC Primary Channels at 

recommended centres. 

Step Two 

Attach the GTEC Soffit 

Cleats to the structural soffit 

at 1200mm centres along the 

centre lines for GTEC Primary 

Channels. 

Cut lengths of GTEC Metal 

Angle equal to the vertical 

distance from the GTEC 

Soffit Cleats to the top of 

the edge channels. Fix GTEC 

Metal Angle to GTEC Soffit 

Cleats with appropriate nuts 

and bolts. Fix GTEC Metal Angle direct to timber joists with 

a minimum overlap of 50mm using a minimum of two GTEC 

High Thread screws. 

Step Three 

Fix the GTEC Primary 

Channel to the GTEC Metal 

Angles with two GTEC Pan 

Head Self Drilling screws. 

Where necessary, join the 

GTEC Primary Channel by 

overlapping 150mm back 

to back & fixing with two 

appropriate nut and bolts. 

Step Four 

Secure the GTEC Ceiling 

Channels at right angles 

to the underside of the 

GTEC Primary Channels at 

recommended centres, using 

GTEC Connecting Clips 

or GTEC Wafer Head Self 

Drilling screws for weight that 

exceeds 20kg/m 2 or double 

boarded systems. 

For the entire length of each 

GTEC Primary Channel, 

alternate the GTEC Connecting 

Clips on each side. 

Step Five 

Position boards with bound 

(long) edges at right angles 

to the GTEC Ceiling Channel 

sections, with adjoining 

edges lightly butted. End 

joints must occur at the 

centre of the GTEC Ceiling 

Channel section, staggered 

by half a board length 

whenever possible. 

Step Six 

Across field of board, screwfix 

plasterboard at 230mm 

max. centres with GTEC Self 

Tapping screws. 

Screw fix cut edges of the 

plasterboard at 150mm max. 

Centres to the GTEC Ceiling 

Channel. Similarly screw fix 

all edges to the GTEC Edge 

Channel at 150mm centres. 




Floors & Ceilings: GTEC Suspended MF Ceiling



GTEC Channels 

GTEC Ceiling Channel 

Galvanised steel channel used to form the Lafarge GTEC 

Suspended MF Ceiling System. 

GTEC Primary Channel 

Galvanised steel channel used to support the ceiling channel in the 

Lafarge GTEC Suspended MF Ceiling System. Heavy gauge also 

available. 

GTEC Edge Channel 

Galvanised steel channel used to form the perimeter support 

of the Lafarge GTEC Suspended MF Ceiling System. 



Versatile metal section used in a number of systems. 

GTEC Phonissimo Acoustic Hanger 

An acoustic suspended ceiling hanger for use with the 

GTEC Suspended MF Ceiling System. 

GTEC Phonistar Acoustic Hanger 

This product is a heavy duty acoustic suspended ceiling hanger 

bracket for use with the Lafarge GTEC Suspended MF Ceiling 

System. This bracket is capable of supporting services and a 

secondary ceiling. 

GTEC Strap Hanger 

May be used in lieu of GTEC Metal Angle for ceiling depths 

up to 1 metre. 


Floors & Ceilings: GTEC Suspended MF Ceiling



GTEC Fixings 









GTEC Pan Head Self Drilling 

For connecting heavy gauge metal components. 



GTEC Wafer Head Self Drilling 

For connecting heavy gauge metal components beneath 

plasterboard. 








GTEC Metal Accessories Continued 

GTEC Boards 

GTEC Connecting Clip 

Galvanised steel clip used as a hanger for the Lafarge GTEC 

Suspended MF Ceiling system. 

GTEC Soffit Cleat 

Galvanised steel bracket used to fix angle brackets or strap hanger 

to the substrate for the GTEC Suspended MF Ceiling system. To be 

used with appropriate nut and bolt. 



resilient adhesive, decorators caulk or as intumescent mastic to seal air 

gaps at system perimeter. NEW - now also available in foil refills. 


GTEC Plasterboard Solutions offer a wide range of standard 

plasterboards and high performance plasterboards for all your drywall 

needs, providing higher levels of protection against impact, sound, 

moisture and fire. 




Floors & Ceilings: GTEC Suspended MF Ceilings

Floors & Ceilings: GTEC T-Bar Flat Ceiling 

GTEC T-Bar Flat Ceiling 

The Lafarge GTEC T-Bar Flat Ceiling System is unique to Lafarge and 

is the latest addition to its ceiling range. It has been designed to provide 

the contractor with a faster, labour saving, high performing one-stop-shop 



Where to use 

• Ideal for commercial and residential 

applications, whether new build 

or renovation. 

• Where services must be accommodated. 

• To upgrade and protect existing 

structures. 


(Screwed) or Wire 

Fixed to GTEC T-Bar 

Edge detail 

5-10mm Gap 

1200mm 

400mm 

Hanger fixing 

Benefits 

• Ceiling height may be varied - minimum 

ceiling void of 45mm 

• Fire tested to BS 476: Part 23 

• Strong steel construction 

• Quick to install 

Tips 

• Suspended heavy loads, air ducting, 

lighting units etc directly from structural 

soffit to avoid loading of the suspension 

framing. 

Typical ceiling opening 

made from GTEC Edge 

Channels (hanger may 

be required) 

FREE DVD 

Order your GTEC Metal Stud Solutions DVD free by calling Lafarge Literatureline on 0 75 7758 


1200mm 

GTEC Edge 

Channel 

GTEC T Bar Cross 

T connection 

Installation 

Step One 

Mark the position on walls 

for the finished ceiling height, 

taking into account the 

thickness and number 

of layers of plasterboard to 

be used. Fix the GTEC T-Bar 

Edge Channels to walls at 

600mm maximum centres 

(short length uppermost). 

S Step Two A 

Attach the GTEC Soffit 

Cleats to the structural soffit 

at 1200mm or 900mm 

centres depending on the 

load along the axis of the 

Main T. 

Cut lengths of the GTEC 

Metal Angle equal to the 

drop of the ceiling, from the 

GTEC Soffit Cleats to the 

start of the horizontal flange 

(minimum drop 50mm). 

S Step Two B 

Fix the GTEC Metal Angle to 

the GTEC Soffit Cleats with 

the appropriate nuts and 

bolts (GTEC Soffit Cleat is 

not required for timber joist 

floors). 

Step Three 

Fix the GTEC Main T-Bar 

to the GTEC Metal Angles 

with GTEC Pan Head Self 

Tapping screws. To fix two 

Main T’s, simply connect 

together. 

It is not necessary to stagger 

the GTEC Main T-Bar 

connection. 

Step Four 

S Step Five 

Fix the GTEC T-Bar Primary 

Cross T-Bar to the GTEC 

Main T-Bar at typical 400mm 

centres to form grid pattern. 

Push-fit until clip is locked 

into position, with the triangle 

shape (spring side) of the 

clip visible on each side. 

To remove the GTEC Cross 

T, press on end of connector 

clip and pull out (may 

require some slight twisting). 

Screw fix the plasterboard 

at 230mm max centres and 

150mm at room perimeter 

and cut edges with the GTEC 

Self Tapping screws on 

the GTEC Cross T, 10mm 

minimum from the edge of 

the board. 




Floors & Ceilings: GTEC T-Bar Flat Ceiling

Floors & Ceilings: GTEC T-Bar Flat Ceiling 


GTEC Channels 


GTEC T-Bar Primary Main T 

Provides the primary structural support similar to the MFCP44. 

GTEC T-Bar Cross T 

Clips into TP3700 to create the grid frame on a flat ceiling system, 

performing a similar function to the MFCC50 top hat section. 

GTEC T-Bar Edge Channel 

Creates the perimeter for both flat ceiling and corridor ceiling systems. 


May be used in lieu of GTEC Metal Angle for ceiling depths up to 

1 meter. 


Galvanised steel bracket used to fix angle brackets or strap hanger 

to the substrate for the Lafarge GTEC Suspended MF Ceiling System. 

To be used with appropriate nut and bolt. 

GTEC Fixings 

GTEC Board 

GTEC T-Bar Metal Angle 


GTEC Suspension Wire 








For use with the Lafarge GTEC Acoustic Floor System. 



SYNIA Board 

NEW PRODUCT 

Synia is a unique plasterboard design from Lafarge that provides the 

ultimate flat ceiling in drylining. 

Traditionally, drylining plasterboards are manufactured with 2 tapered 

edges in order to create a seamless finish when jointed. 

Synia has been created with a unique edge design which, once fixed, 

reveals a 4 tapered edge for jointing. This offers the installer a faster, 

easier solution, resulting in the ultimate flat ceiling. 


Floors & Ceilings: GTEC T-Bar Flat Ceiling

Floors & Ceilings: GTEC T-Bar Corridor Ceiling 


The Lafarge GTEC T-Bar Corridor Ceiling System is a unique system to 

Lafarge and is the latest addition to its ceiling range. It has been designed to 

provide the contractor with a faster, labour saving, high performing one-stopshop 



Where to use 

• Ideal for commercial and residential 

applications, whether new build or 

renovation. 

• Where services must be accommodated.. 

• To upgrade and protect existing structure. 

s. 

• For corridor spans up to 2.05m (with 

12.5mm standard plasterboard at 300mm 

centres - See Load/Span Table). 

Edge detail 


fixed to Corridor Wall 

5-10mm 

Gap 

Benefits 

• No hanger required for spans 

of up to 2m. 

• Ceiling height may be varied. 

• Fire tested to BS 476: Part 23. 

Tips 

• It is important that the maximum size 

of a ceiling without either a supporting 

partition, joint or break should be 15m x 

15m (225m2). into existing background 

is essential when installing this system. 


Typical ceiling opening made 

from GTEC Edge Channels/ 

GTEC Metal Angle Hanger 

TS2000 GTEC Corridor T-Bar 

Spanning Corridor at max 

450mm centres 

Installation 

Step One 

Mark the position on walls 

for the finished ceiling height 

taking into account the 

thickness and number of 

layers of plasterboard to be 

used. Fix the GTEC T-Bar 

Edge Channels to walls at 

600mm maximum centres 

(short length uppermost). 

Step Two 

Cut the GTEC T-Bar Corridor 

Span T as required to the 

corridor width and slide 

into the GTEC T-Bar Edge 

Channel, at recommended 

centres (400 or 450mm). 

If hangers are required (see 

span table), fix the GTEC 

Corridor T-Bar to the GTEC 

Metal Angle with 2 GTEC 

Pan Head Self Tapping 

screws. 

Step Three 

Position the boards with long 

edges typically parallel to the 


with adjoining edges lightly 

butted. End joints must occur 

at the centre of the GTEC 

Corridor Span T section, 

staggered by half a board 

length whenever possible. 

Screw fix the plasterboard 

at 230mm max centres with 

GTEC Self Tapping screws 

on the GTEC Span T. Screw 

fix the cut edges of the 

plasterboard at 150mm max. 

centres to the GTEC T-Bar 

Corridor Span T. 

Screw fit all perimeter edges 

to the GTEC T-Bar Edge 

Channel at 150mm centres. 

It is also possible to fix the 

plasterboard with long edges 

parallel to the GTEC T-Bar 

Corridor Span T with a 

joining edges lightly butted. 




Floors & Ceilings: GTEC T-Bar Corridor Ceiling

Floors & Ceilings: GTEC T-Bar Corridor Ceiling 


GTEC Channels 

GTEC Accessories 


Creates the perimeter for both flat ceiling and corridor ceiling systems. 

GTEC T-Bar Corridor Span T 

Spanning T for corridors with no end connectors. 


May be used in lieu of GTEC Metal Angle for ceiling depths up to 

1 meter. 


Galvanised steel bracket used to fix angle brackets or strap hanger to 

the substrate for the Lafarge GTEC Suspended MF Ceiling System. 

To be used with appropriate nut and bolt. 

GTEC Suspension Wire 





GTEC Fixings 

GTEC Board 









SYNIA Board 

NEW PRODUCT 

Synia is a unique plasterboard design from Lafarge that provides the 

ultimate flat ceiling in drylining. 

Traditionally, drylining plasterboards are manufactured with 2 tapered 

edges in order to create a seamless finish when jointed. 

Synia has been created with a unique edge design which, once fixed, 

reveals a 4 tapered edge for jointing. This offers the installer a faster, 

easier solution, resulting in the ultimate flat ceiling. 

GTEC Pregybel 

GTEC Pregybel is a range of perforated plasterboards which combine 

superior sound absorption performance with an aesthetic design. 

Mainly used in ceiling applications for retail centres, offices, 

apartments, hospitals, schools, showrooms, auditoriums, cinemas and 

galleries, GTEC Pregybel provides high quality, functional, beautiful 

environments. 


Floors & Ceilings: GTEC T-Bar Corridor Ceiling

Floors & Ceilings: GTEC Direct to Timber Ceiling 

GTEC Direct to Timber Ceiling 

The Lafarge GTEC Direct to Timber System is the method for attaching 

plasterboard to the underside of timber floor joists and roof trusses. 


Where to use 

• Lining new ceilings, typically for 

domestic use. 

• Lining existing ceilings. 

• Provides fire resistance and sound 

insulation where required. 

GTEC Noggins 

With two layers of boarding, stagger 

joints and fixings between layers 

Benefits 

• Quick and simple to install. 

• When taped and jointed it provides 

a smooth finish for direct decoration. 

• Forms a ready base for gypsum plaster 

or textured finishes. 

Stagger joints between cut (short) 

edges and centre over joists or 

noggins 

Installation 

Standard Installation 

Fix noggings around the ceiling perimeter and, if required, to support any board edges not already supported 

by joists. 

Offer up plasterboards with their paper bound (long) edges at right angles to the joists. Butt board edges 

lightly against each other with a maximum allowable gap of 3mm. Working from the centre of each board, 

fix with nails at 150mm centres or screws at 230mm centres, and 150mm centres at perimeter and the cut 

ends of board. Fixings should be no closer than 10mm to the bound edges and 13mm to the cut edges of 

the boards. The fixings should also be at least 6mm in from edges of timber framing. 

GTEC Resilient Bar Deep Installation 

When GTEC Resilient Bar Deep is required to achieve added acoustic performance, fix the bars at right 

angles to the joists at 450mm maximum centres, 400mm for 2400mm wallboard, through prepunched holes 

in the flange using 32mm GTEC High Thread. Set out the Resilient Bars as close as possible to the room 

perimeter. Do not let the GTEC Resilient Bars touch the perimeter wall. Joint the bars by overlapping directly 

over joists, with a minimum 200mm overlap. 

Fix plasterboards with long edges at right angles to GTEC Resilient Bars using GTEC Self Tapping, ensuring 

screws are not in contact with the joists. For two layer boarding layouts, stagger the outer layer and fix short 

edges of the boards to GTEC Resilient Bars. 

Plasterboard Selection and Finishing 

Where there may be risk of interstitial condensation, use GTEC Vapour Board as the inner layer of the ceiling, 

with the metallised film facing the joists. If GTEC Fire Board is used it must always be used as the outer layer. 


GTEC Fixings 






For attaching plasterboard to timber framework. 










Floors & Ceilings: GTEC Direct to Timber Ceiling

Wall Linings: GTEC Direct Bond 

GTEC Direct Bond 

The Lafarge GTEC Direct Bond System is used for attaching 

plasterboard, including the GTEC Thermal Board range directly onto 

masonry backgrounds. 


Where to use 

• Lining new masonry walls for 

domestic and commercial use. 

• Lining old masonry walls which 

have an uneven background. 

Benefits 

• Quick and cost effective to install. 

• Can correct minor irregularities 

in the existing background. 

• Mechanical fixing is not needed 

with standard board. 

Bonding dab spacings 

Continuous ribbon of GTEC Universal 

Bonding Compound around wall 

perimeter required on external walls 

Use of GTEC Universal Bonding Compound 

Board 

thickness 

across 

(mm) 

Board 

width 

(mm) 

Vertical 

centres 

(mm) 

9.5 900 450 3 

9.5 1200 400 4 

12.5 900 450 3 

12.5 1200 600 3 

Number 

of dabs 

across 

board 

Tips 

• GTEC Universal Bonding Compound 

must harden before jointing - allow 

8 hours. 

• Only use on walls which are free 

from damp. 


Installation 

Step One 

Apply a chalk line to floor 

and ceiling, allowing for 

the thickness of selected 

plasterboard or thermal 

laminate, plus a minimum 

10mm of GTEC Universal 

Bonding Compound. 

Step Two 

Starting from a window, door 

reveal or internal angle, mark 

wall vertically with chalk for 

the rows of dabs at the 

required centres. 

Allow for dabs at 25mm in 

from vertical edges of board. 

Step Three 

On external walls apply 

continuous perimeter ribbon 

of GTEC Universal Bonding 

Compound at 50mm below 

ceiling line and 50mm above 

floor level. 

A continuous perimeter 

should also be applied 

around any service cut 

out i.e. light switches. 

Step Four 

Apply vertical dabs at 

required centres on the chalk 

lines. Dabs should be 50 to 

75mm wide, about 250mm 

long at 300mm centres and 

between 10 to 25mm thick. 

The contact area of dabs 

must be at least 20% of the 

board area. 

Step Five 

Press plasterboard back 

firmly against the dabs, fitting 

the board tight against the 

ceiling. Temporarily wedge 

the bottom edge in position 

using offcuts. 

At corners, align 

as shown in the application 

details. Ensure tight butt 

joints at junctions. 

Step Six 

Tap board into alignment 

with floor and ceiling chalk 

lines using a straight edge. 

Remove wedges when the 

compound has dried (allow 

8 hours). 

For thermal laminates, 

secure with two GTEC 

Nailable Plugs after 

GTEC Universal Bonding 

Compound has set. 




Wall Linings: GTEC Direct Bond

Wall Linings: GTEC Direct Bond 


GTEC Adhesive & Renders 

GTEC Fixing 

GTEC Boards 

GTEC Universal Bonding Compound 

Gypsum based compound for direct bonding plasterboard and 

thermal boards to walls, or bonding GTEC Metal Furing to walls. 

(Previously Bonding Compound) 

GTEC Drywall Sealer 

Ivory, pre-decoration sealer for plasterboard. Equalises the suction 

of the entire surface accross board and joint. Enables the stripping 

of wallpaper. Can also provide a vapour check (15MNs/g), if two coats 

are applied to the plasterboard. Does not include a stain inhibitor. 

GTEC Ecoat 

NEW PRODUCT 

A gypsum based acoustic render mix for use on party walls prior 

to direct bonding. 

GTEC Nailable Plugs 

For the mechanical fixing of GTEC Thermal Boards. 


• Typical quantities: from 50 to 100 nails 


Lafarge GTEC Plasterboard Solutions offer a wide range of standard 

boards and high performance plasterboards for all your drywall needs, 

providing higher levels of protection against impact, sound, moisture 

and fire. 

See page 64 Taping & Joining section for a range of finishing solutions. 

GTEC Ecoat 

GTEC Ecoat is designed to meet Part E requirements for party walls 

in the UK. The product seals porous holes in blockwork walls to 

improve the acoustic performance prior to drylining. 


The new GTEC Ecoat product is gypsum 

based and is a superior product to sand 

and cement. Robust Detail status, for more 

information please contact our Technical 

Enquiryline on 01275 377789. 

Benefits 

• 5m² coverage per 25kg bag (offers twice 

the coverage of traditional sand and 

cement options). 

• Easy to handle bagged product. 

• Superior workability. 

GTEC Ecoat 

NEW PRODUCT 

GTEC Universal 

Bonding Compound 12.5mm GTEC 

Standard Board 

P A G E 4 0 | L A F A R G E | T H E D R Y L I N I N G S O L U T I O N S E L E C T O R T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 4 

Wall Linings: GTEC Direct Bond

Wall Linings: GTEC Dryliner 

GTEC Dryliner 

The Lafarge GTEC Dryliner System is a system suitable for drylining 

both new and existing masonry backgrounds, and for the concealment 

of services. 


Where to use 

• For cavity width between wall 

and back of plasterboard lining 

ranging from 25mm to 130mm. 

• Lining masonry walls which 

are uneven. 

Benefits 

• Simple, quick, cost effective and 

suitable for fixing all types of board. 

• A completely dry system using 

secure mechanical fixings. 

GTEC Dryliner Track fixed to soffit 

GTEC Dryliner Channels screw fixed 

to drylining brackets as required 

All joints taped and filled 

GTEC Dryliner Bracket as required 

GTEC Dryliner Track fixed to floor 

• Surface-mounted services can 

be easily accommodated. 

• Mineral wool can be incorporated 

within the cavity for thermal 

or acoustic insulation. 

Tips 

• Remember to treat walls 

for any damp before insulation. 

• Secure fixing into existing 

background is essential. 

Installation 


Step One 

Fix GTEC Dryliner Track at 

600mm centres to the floor 

using suitable fixings. Allow 

for required cavity width 

(25mm to 130mm). 

Step Two 

Fix GTEC Dryliner Track to 

ceiling with a suitable fixing, 

ensuring GTEC Dryliner Track 

at ceiling is plumb with that 

on the floor. For 12.5mm 

plasterboard mark horizontal 

lines at 800mm centres 

and vertical lines at 600mm 

centres (400mm for GTEC 

Thermal Boards). Mark lines 

50mm from external corners. 

Step Three 

Starting at centre of wall 

height, position GTEC 

Dryliner Brackets directly 

to wall at maximum 800mm 

vertical centres on the 

marked lines. Secure each 

bracket to wall with a suitable 

fixing. 

Step Four 

Cut each GTEC Dryliner 

Channel 5mm shorter than 

the floor to ceiling height. 

Locate GTEC Dryliner 

Channel into GTEC Dryliner 

Track at floor and ceiling. 

Step Five 

Ensure channel is plumb, 

and secure to each bracket 

leg using GTEC Pan Head 

Self Tapping screws. Where 

necessary bend back the 

legs of the bracket so they do 

not protrude past the face of 

the channel. 

Step Six 

Butt plasterboard edges 

lightly against each other and 

centre the edges over the 

channels. Fix plasterboard to 

framing with GTEC Drywall 

Self Tapping screws at 

300mm centres. Where the 

height of the lining is greater 

than the plasterboard length, 

use GTEC Fixing Channel (or 

GTEC Flat Strap for double 

boarded systems) to support 

the horizontal cut edges of the plasterboards. 



Wall Linings: GTEC Dryliner

Wall Linings: GTEC Dryliner 

GTEC Dryliner 

GTEC Channels 

GTEC Tracks 


GTEC Drylining Channel 

A galvanised steel furring channel for plasterboard fixing. It is used 

in the Lafarge GTEC Dryliner system. 

GTEC Fixing Channel 

Galvanised metal channel used in linings and partitions to provide 

support plasterboard joints and heavy fixtures. Also provides a 

fire stop. 

GTEC Drylining Track 

Galvanised metal J shaped section used as a track or perimeter 

channel in the Lafarge GTEC Dryliner system. 

GTEC Drylining Channel Connector 

A galvanised clip used to join GTEC Dryliner Channels. 



GTEC SR Bracket 

Steel section used to brace dryliner channels to substrate in the 

Lafarge GTEC Dryliner System. Also available as an GTEC XR 

Bracket. 

GTEC Fixings 

GTEC Boards 

GTEC Insulation Hold 

Metal supports used with timber and metal framing for holding mineral 

wool insulation. 

GTEC Flat Strap 

Galvanised metal flat strap used in linings and partitions to provide 

support for plasterboard joints. Also provides a fire stop. 









GTEC Wafer Head Self Tapping 

For connecting light gauge metal components beneath plasterboard. 








and fire. 

P A G E 4 4 | L A F A R G E | T H E D R Y L I N I N G S O L U T I O N S E L E C T O R T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 4 5 

Wall Linings: GTEC Dryliner

Wall Linings: GTEC Independent Wall Linings 

GTEC Independent Wall Lining 

The Lafarge GTEC Independent Wall Lining Systems combine the features 

of other GTEC Metal systems to give high strength and quickly assembled 

drylining solutions. 


Where to use 

• Designed to be installed clear of a variety 

of existing backgrounds. 

• Drylining reinforced concrete walls, steel 

framed walls, and renovation work where 

existing walls may form an unsuitable 

substrate for other systems. 

Benefits 

• The systems allow space for services, 

and also for high levels of thermal and 

acoustic insulation. 

GTEC U Track snipped and bent 

upwards or downwards to form 

door head member. Fixed to 

GTEC C studs with GTEC Wafer 

Head Self Drilling screws. 

GTEC C Stud 

150mm 

Minimum 10mm gap 

• The systems offer a range of GTEC 

I Stud widths of 50mm, 60mm, 70mm, 

90mm to accommodate a wide range of 

height requirements and can achieve a 

maximum height without bracing of 5.4m. 

The systems are suitable for fixing all 

types of plasterboard. 

Tips 

• Treat walls for any damp before 

installation. 

• Secure fixing at the head and base track 

into existing background is essential when 

installing this system. 

GTEC U Track 

P A G E 4 6 | L A F A R G E | T H E D R Y L I N I N G S O L U T I O N S E L E C T O R 

600mm or 400mm 

GTEC I Stud 

Internal corners 

300mm 

Installation 

Step One 

Set out the System inside 

the existing wall; allow a 

minimum cavity width of 

10mm between external wall 

and the back of the metal 

framing, or to the insulation. 

Fix GTEC U Track to floor 

at 600mm centres using 

suitable fixings. 

Step Two 

Install a GTEC C Stud using 

a spirit level to plumb, 

upright on end wall, and fix 

at 600mm centres using 

suitable fixings. 

Step Three 

Install ceiling GTEC U Track 

onto the end wall GTEC C 

Stud, using a GTEC I Stud (as 

a temporary prop) and spirit 

level. Plumb the opposite end 

of the ceiling GTEC U Track to 

align with floor GTEC U Track. 

Screw-fix the ceiling GTEC U 

Track into position at 600mm 

centres or less. 

Now fix the opposite end wall 

GTEC C Stud at 600mm 

centres. 

Step Four 

Using a disc cutter, drop-saw 

or angle grinder, cut GTEC 

I Studs to length (5mm 

shorter than the floor to 

ceiling height) whilst they are 

in a pack. If ceiling or floor 

are very uneven, you will 

need to cut GTEC I Studs 

separately. 

Step Five 

Insert the stud into the floor 

and ceiling tracks and twist to 

lock. Position them at 600mm 

centres for 1200mm wide, 

12.5mm thick plasterboard. 

Once the GTEC I Studs are 

friction-fitted, fix the end GTEC 

C Studs to head and floor 

GTEC U Tracks with GTEC 

Wafer Head Self Drilling 

screws or crimping tool. 

Step Six 

Cut the plasterboard 5 to 

8mm shorter than the floorto-ceiling 

height, butt firmly 

against the ceiling and fix 

to the framing with GTEC 

Drywall Self Drilling screws 

at 300mm centres. 

Butt board edges lightly 

against each other and 

centre the edges over the 

studs. 



T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 4 7 

Wall Linings: GTEC Independent Wall Linings

Wall Linings: GTEC Independent Wall Linings 

GTEC Independent Wall Lining 

GTEC Studs 

GTEC Tracks 

GTEC I Stud 

Galvanised I Shaped metal section used with GTEC U Track to 

provide a metal frame for the main run of wall linings. 


• Widths provided from 50mm to 90mm 

• Gauge from 0.52mm to 0.7mm 

GTEC C Stud 

Galvanised C shaped metal section used with GTEC U Track 

to provide framework for wall linings and partitions. 




GTEC U Track 

Galvanised U shaped metal section used with GTEC C Studs 



• Widths available from 45mm to 148mm 

GTEC U Track Deep Flange 

Used for partitions with heights up to 4.2m, or at the soffit where a 

deflection head is required. 

• Available in 3 metre lengths 


• Gauge of 0.52mm 

• GTEC U Track Extra Deep Flange also available in 0.7mm and 

0.9mm gauge respectively 


GTEC Fixings 

GTEC Boards 







gaps at system perimeter. NEW - now available in foil refills. 



GTEC Self Drilling 

For attaching plasterboards to heavy gauge metal wall 

and ceiling systems. 

• Available in the following sizes: 25mm, 32mm, 38mm, 

44mm, 67mm 

• Typical box quantities: 500 to 1000 screws 

GTEC Wafer Head Self Drilling 

For connecting heavy gauge metal components beneath 

plasterboard. 








and fire. 


Wall Linings: GTEC Independent Wall Linings

Wall Linings: Linings to Timber Frame 

Linings to Timber Frame 

In timber framed housing the Lafarge Lining to Timber Frame System 

offer easy fixing to light-weight constructions. The high strength and rigidity 

of Lafarge plasterboards make them suitable for use in the assembly of 

prefabricated panels which are braced with sheathing ply or similar. 


System Assembly 

• Typically, timber framed external walls 

have studs set out at 400mm or 600mm 

centres to maximise economical use of 

the lining materials. 

• Use 12.5mm GTEC Boards with a vapour 

control layer. This prevents interstitial 

condensation forming in the wall cavity. 

Insulation 

• Insulation should be supported using 

GTEC Insulation Hold strips 150mm below 

the wall head and at 1200mm centres 

down the height of the wall. 

Minimum 50mm cavity between 

sheathing and external wall 

cladding 

Breather membrane to BS 4016 

Insulation quilt 

GTEC Thermal 

Sheathing Board 

Boarding 

• For internal linings, lightly butt 

plasterboard edges against each other: 

the maximum permissible gap is 3mm. 

Fix the boards with GTEC High Thread 

screws at 300mm centres. Fixings should 

be no closer than 10mm to the bound 

edges and 13mm to the cut edges of the 

boards. 

GTEC Resilient Bars 

• Where the GTEC Resilient Bar Deep is 

to be fixed to timber studs the following 

centres apply: 

• 400mm centres for single layer boarding. 

• 600mm centres for double layer boarding. 

Framing studs at 

600mm centres 


incorporating a vapour 

control layer secured to 

timber framing 


GTEC Fixings 

GTEC Board 














GTEC Drywall High Thread 

For attaching plasterboard to light gauge Lafarge GTEC Metal 

and Ceiling systems. 

• Available in sizes from 25mm to 86mm 

• Typical box quantities from 200 to 1000 screws 

GTEC Drywall Self Tapping 





GTEC Vapour Board 

Used as a lining where there is a risk of condensation. The board has 

a metallised film bonded to one face which acts as a vapour control 

layer and can also give improved thermal performance in some 

circumstances. 

• Vapourcheck film can be applied to most plasterboards 




Wall Linings: Linings to Timber Frame

Partitions: GTEC Metal Stud Partitions 

GTEC Metal Stud Partitions 

The Lafarge GTEC Metal Stud Partitions system is an economical friction-fit 

system to assemble frames for strong, compact and light-weight non-loadbearing 

partitions. 


Where to use 

• Partitioning for domestic and 

commercial use. 

• Heights up to 12 metres with various 

range of track and stud widths. 

Benefits 

• Quick to erect, light-weight, clean and 

services are easy to accommodate. 

• Metal stud is dimensionally accurate 

and will not twist or bow. 

GTEC Intumescent Acoustic 

Sealant around perimeter 

Single layer boarding: joints on opposite 

faces offset, all joints taped and filled 

Floor track fixed at 600mm centres 

Timber sole plate is required on uneven floors 

• Mineral wool can easily be installed 

for improved sound insulation. 

Tips 

• GTEC U Tracks and GTEC C Studs are 

cold rolled galvanised steel and can be 

stored outside under cover for short 

periods without deterioration. 

• An electrical or battery operated 

Drywall Screw Gun is recommended 

for speed and accurate installation. 

FREE DVD 

Order your GTEC Metal Stud Solutions DVD free by calling Lafarge Literatureline on 0 75 7758 


Installation 

Step One 

From a fixed point 

mark out the line 

of partition. Fix 

GTEC U Track to timber 

or concrete floor along 

the setting out line of the 

partition using suitable 

fixings. Cut GTEC U Track 

and GTEC C Stud using 

tin snips. Ensure GTEC C 

Studs are cut 5mm shorter 

than floor to ceiling height. 

Step Two 

Install a GTEC C Stud 

using a spirit level to 

plumb on end wall. Place 

ceiling GTEC U Track into 

wall GTEC C Stud, plumb 

opposite end and screw-fix 

into position at 600mm 

centres. Plumb and screwfix 

opposite end wall 

GTEC C Stud. 

Step Three 

Locate intermediate 

GTEC C Studs at required 

centres. Use extra GTEC 

C Studs at openings, 

corners, T junctions and 

stop ends. Fix these studs 

with GTEC Wafer Head 

Self Tapping or crimping 

tool. 

Step Four 

Form the door header by 

using a piece of GTEC U 

Track. Secure header 

onto GTEC C Studs. 

Step Five 

Form a timber background 

construction to create a 

secure fixing for the door 

frame by placing a suitably 

sized timber insert into the 

back of door frame Studs 

and header Track. Secure 

these timbers using GTEC 

High Thread screws. 

Step Six 

Install plasterboard to 

one side of partition. Cut 

plasterboard 5mm to 8mm 

shorter than floor-to-ceiling 

height, butt firmly against 

the ceiling and fix with GTEC 

Self Tapping screws at 

300mm centres. 




Partitions: GTEC Metal Stud Partitions



GTEC Studs 

GTEC C Stud 

Galvanised C shaped metal section used with GTEC U Track 





GTEC I Stud 

Galvanised I Shaped metal section used with GTEC U Track to 

provide a metal frame for the main run of wall linings. 




GTEC Omega Acoustic Stud 

A unique galvanised omega shaped stud which, when used in 

a Lafarge GTEC Partition system, gives up to 3 RwdB increased 

acoustic insulation over standard 70mm GTEC Metal Studs with the 

same board linings. See product literature for performance details. 


• Widths provided 70mm, 90mm and 146mm 


GTEC Tracks 

GTEC Channel 

GTEC U Track 






Used for partitions with heights up to 4.2m, or at the soffit where a 


• Available in 3 metre lengths 



• GTEC U Track Extra Deep Flange also available in 0.7mm and 

0.9mm gauge respectively 

GTEC Flex Track Deep Flange 

Flex track is designed to allow easy construction of curved partitions. 

It is a galvanised 0.7mm metal angle used in place of standard metal 

U track. It is supplied pre-cut to allow a minimum radius of 600mm to 

be achieved. 

• Available length of 3000mm 

• Dimension of 50mm x 23mm 


Galvanised metal channel used with linings and partitions to provide 

support plasterboard joints and heavy fixtures. Also provides a 

fire stop. 








GTEC Flat Strap 

Galvanised metal flat strap used in linings and partitions to provide 

support for plasterboard joints. Also provides a fire stop. 








GTEC Fixings 

GTEC Boards 









GTE C High Thread 




The complete range of GTEC Screws are detailed on page 74. 





and fire. 



Partitions: GTEC Acoustic Homespan 

GTEC Acoustic Homespan 

The Lafarge GTEC Acoustic Homespan system is a light-weight, 

non-loadbearing metal stud partition system primarily intended for domestic 

applications. The system is designed to take one layer of 15mm x 900mm 

wide GTEC Acoustic Homespan Board fixed to each side. 


The Lafarge GTEC Acoustic Homespan 

system combines purpose designed sound 

absorbing boards with technically advanced 

metal GTEC C Studs to provide at least 

40 R w dB sound performance without the 

requirement for insulation. 

Readily meeting the requirements of Building 

Regulation Part E. The Lafarge GTEC 

Acoustic Homespan system can also be 

used to match still more demanding 

specifications. The introduction of a 25mm 

19 kg/m³ mineral wool insulation increases 

performance to 43 R w dB. 

GTEC U Track snipped and 

bent downwards to form door 

head member. Fixed to starter 

studs with GTEC Wafer Head 

Self Tapping 

Studs at 450mm centres 

Where to use 

• Primarily intended for domestic 

applications. 

• Light-weight, non-loadbearing. 


Benefits 

• Achieves 40 R w dB sound rating without 

insulation. 

• Cost-effective compared with timber stud. 

• Eliminates nail popping and cracking. 

Installation 

Step One 

Mark out the line of the 

partition. Fix GTEC U 

Track to floor along the 

setting out line at 600mm 

centres. Cut the GTEC U 

Track (and GTEC Acoustic 

Homespan Studs) to 

length as necessary using 

tin snips. Studs should be 

cut 5mm shorter than the 

floor to ceiling height. 

Step Two 

Fix GTEC Starter Stud to 

the end wall at 600mm 

centres. Place ceiling GTEC 

U Track on top of the end 

wall Stud. Then, using a 


Stud and spirit level, ensure 

opposite end of ceiling 

GTEC U Track is plumb 

with the floor GTEC U Track 

and screw-fix it into position 

at 600mm centres. 

Step Three 

Insert the GTEC Acoustic 

Homespan Studs into the 

GTEC U Tracks at 450mm 

centres and twist to lock. 

The intermediate Studs 

should all face the same 

way. To allow adjustment 

when fixing plasterboard 

studs should not be screw 

fixed. 

Step Four 

Use GTEC Starter Studs 

at door openings, corners, 

T junctions and stop ends. 

These must be fixed to 

ceiling and floor GTEC U 

Tracks with GTEC Wafer 

Head Self Tapping or 

a crimping tool. Form 

door header from GTEC 

U Track, allowing for a 

minimum 150mm at each 

end to be cut and folded 

down. Secure the header to the GTEC Starter Studs using a 

crimping tool or GTEC Wafer Head Self Tapping. 

Step Five 

Form a timber background 

construction to create a 

secure fixing for the door 

frame by placing a suitably 

sized timber insert into the 

back of door frame Studs 

and header Track. Secure 

these timbers using GTEC 

High Thread. 

Step Six 

Fix GTEC Acoustic 

Homespan Board to one 

side of the partition. Cut 

the board 5mm to 8mm 

shorter than the floor to 

ceiling height, butt firmly 

against the ceiling and 

fix with 25mm GTEC 

Self Tapping at 300mm 

centres. When one side is 

complete, repeat for the 

other side of the partition, 

ensuring that the joints are staggered by 450mm. To 

maximise the acoustic performance use GTEC Intumescent 

Acoustic Sealant and seal around system perimeter. 



T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 5 9 

Partitions: GTEC Acoustic Homespan

Partitions: GTEC Acoustic Homespan 


GTEC Studs 

GTEC Tracks 

GTEC Accessory 

GTEC Acoustic Homespan C Stud 

GTEC Acoustic Homespan is a 75mm nominal width metal stud 

partitioning system using 44mm/50mm GTEC Acoustic Homespan 

C Studs at 450mm centres and one layer of GTEC Acoustic Homespan 

Board each side to give a laboratory result of 40 R w dB. 


• Widths provided in 44mm and 50mm 


GTEC Acoustic Homespan Starter Stud 

GTEC Acoustic Homespan Starter Studs are used at wall abutments 

and at door openings as part of the Lafarge GTEC Acoustic 

Homespan system. 




GTEC U Track 







Used for partitions with heights above 4.2m, or at the soffit where a 


• Available in a length of 3000mm 

• Width provided 52mm 








GTEC Fixings 

GTEC Boards 









GTE C High Thread 




The complete range of GTEC Screws are detailed on page 74. 

GTEC Acoustic Homespan Board 

GTEC Acoustic Homespan Board has one decorative ivory face 

available with either a tapered edge or square edge profile and a 

grey faced back liner suitable for the construction of Lafarge GTEC 

Acoustic Homespan systems. 

GTEC Acoustic Homespan Board complies with BS 1230 Type 1 

and BS EN 520 Type D. 

GTEC Acoustic Homespan MR Board 

GTEC Acoustic Homespan MR Board has one decorative ivory face 

available with tapered edges and a green faced back liner suitable for 

the construction of Acoustic Homespan partitions that require superior 

moisture resistance. 

GTEC Homespan MR Board complies with BS 1230 Type 3 and BS 

EN 520 Type D and H1. 


Partitions: GTEC Acoustic Homespan

Partitions: GTEC Timber Stud Partitions 

GTEC Timber Stud Partitions 

The Lafarge GTEC Timber Stud Partitions system are typically for domestic 

use either loadbearing or non-loadbearing. 


Where to use 

• Typically for domestic use. 

• Can provide fire resistance and sound 

insulation where required. 


around perimeter 

In the case of single layer boarding, joints on opposite faces offset, all 

joints taped and filled 

Timber studs 

Cross noggin at mid height 

Timber sole plate 

Benefits 

• When taped and jointed it provides 

a smooth finish for direct decoration. 

• Forms a ready base for gypsum plaster 

or textured finishes. 

300mm at 

end of partition 

Studs at 400mm, 

450mm or 600mm centres 



Installation 

GTEC Boards 

Metal Components & Fixings 

Step One 

Install timber sole plate and framing members to end walls and ceiling. 

Ensure all framing is straight, plumb and true, and will provide a firm 

support for the plasterboards. 

Step Two 

Fix intermediate vertical studs to the timber floor and ceiling plates at 

maximum 400mm centres for 9.5mm plasterboard, and at 600mm centres 

for 12.5mm and 15mm plasterboard. Framing should be arranged so as to 

avoid plasterboard widths of less than 300mm. Plasterboard edges must be 

supported at all openings, junctions and corners. All framing should provide 

a minimum bearing width for the plasterboard of not less than 38mm. Note: 

For all 900mm wide plasterboards, stud centres should be at 450mm. 

Step Three 

Cut plasterboard 5mm to 8mm shorter than the floor-to-ceiling height, 

butt firmly against the ceiling and fix with GTEC Drywall Nails at 150mm 

centres or GTEC High Thread at 300mm centres. Butt plasterboards 

lightly against each other, centring joints over the studs. With double layer 

boarding, the vertical joints should be staggered between layers. 





and fire. 













Partitions: GTEC Timber Stud Partitions

GTEC Finishing Solutions 

FINISH 

Taping & Jointing Applications 

Tapered Joints 

External Angles 

Internal Angles 

The Finishing Solution brochure is a 

comprehensive guide to the Lafarge GTEC 

Finish product range. It provides information 

for selecting the right finishing product for 

the job, application instructions to creative 

solutions such as GTEC Cove and GTEC 

Profiles. 

The Lafarge GTEC Taping & Jointing system 

is used to create continuous seamless joints 

when drylining walls and ceilings. Covering 

three and two step application methods, 

Lafarge has the right finishing product for 

any drylining system. 

Taping and jointing does not involve as much 

labour or drying out time as a traditional 

plaster skim. All our jointing compounds 

finish white, are exceptionally smooth and 

easy to sand for a very fine finish. 

Tapered Edge Board Jointing 

GTEC Joint Tape bedded 

in Jointing Compound 

Compound struck off 

flush with the face of 

plasterboard 

Second coat of jointing 

compound feathered out 50 

to 60mm beyond first coat 

Final coat of jointing 

compound feathered out 

50 to 60mm beyond 

second coat 

GTEC Universal Sealer 

or GTEC Drywall Sealer 

Jointing Compounds 

There are three different types of Jointing Compounds: 

GTEC Setting Compounds 

Traditional compounds used for filling 

and bedding joints for a 3 coat application. 

Not suitable as a finishing coat. 

GTEC Air-drying Compounds 

Air-drying compounds used for bedding 

joints and as a finishing coat for either 

a 3 or 2 coat application. 

Lafarge offer both powder and ready 

mixed products which can also be used 

for machine application. Air-drying 

compounds are not suitable for 

bedding external corners, always 

use a setting compound. 

Jointing Compounds Product Selector 

Product Type Bedding Tape Filling Coat Finishing Coat 

* Whilst air drying compounds are suitable for filling joints, it is necessary to leave adequate 

drying time between each coat. 


Classic Range 

Xtra Range 

Deco Range 

GTEC Joint Filler Setting ✔ ✔ ✘ 

GTEC Joint Cement Air Drying ✔* ✔ ✔ 

GTEC Smartmix Air Drying ✔* ✔ ✔ 

GTEC Allset Xtra 

Setting/ 

Air Drying 

GTEC Setting / Air-drying 

Combined 

A combined air-drying and setting compound 

used as an all in one jointing compound for a 

2 coat application. 

✔ Not Required ✔ 

GTEC Joint Cement Xtra Air Drying ✔* Not Required ✔ 

GTEC Smartmix Xtra Air Drying ✔* Not Required ✔ 

GTEC Deco Joint Cement Air Drying ✔* Not Required ✔ 

GTEC Deco Machine Air Drying ✔* ✔ ✔ 

GTEC Deco Filler Setting ✔ ✔ ✘ 

GTEC Finishing Solutions


FINISH 

GTEC Setting Compound 

GTEC Joint Filler 

GTEC Air-drying Compounds 

Gypsum based joint compound 

with 90 minute setting time 

for bedding tapes by hand 

application. Also used for 

bedding external corner 

protection. 

(Previously known as Fast Set) 

GTEC Joint Cement 

Air-drying joint cement for 

bedding tapes and finishing 

joints by hand or machine. 

(Previously known as New Pure 

Velvet) 

GTEC Joint Cement Xtra 

Light-weight, air-drying joint 

cement offering superior 

coverage and easy sanding. 

Can be used for bedding tapes 

and finishing joints in a 2-stage 

application. Also suitable for 

machine application. 

(Previously known as Rapid Sand) 

Coverage Guide: 

12.5kg bag 

25m² Bedding & Filling Only 

37m² Bedding Coat Only 

Shelf Life: 

4 months 


25kg bag 

55m² Full Taping Operation 

165m² Finishing Coat Only 

Shelf Life: 

6 months 


22.5kg bag 



Shelf Life: 

6 months 

GTEC Air-drying Compounds Ready-mixed 

GTEC Smartmix 

Ready-mixed, mid-weight joint 

compound offering better 

coverage and workability 

than standard ready-mixed 

compounds. Can be used for 

bedding and finishing by hand 

or machine. 

(Previously known as Fineform) 

GTEC Smartmix Xtra 

Ready-mixed, light-weight 

compound offering superior 

coverage and easy sanding. 

Can be used for bedding 

tapes and finishing joints in a 

2-stage application. Ideal for 

machine application. 

(Previously known as 

Readymix Lite) 

GTEC Setting / Air-drying Combined 

GTEC Allset Xtra 

Combined setting and 

air-drying compound, allows 

a single compound to be used 

for bedding all tapes and 

finishing. 

Can be used in a 2-stage 

application. 

(Previously known as 

Easy Finish) 


20kg bucket 




20kg bucket 




Shelf Life: 

6 months 

Shelf Life: 

6 months 


10kg bag 


47m² Bedding Coat Only 

Shelf Life: 

4 months 



FINISH 

GTEC Tapes, Beads & Sealers 

Tapes & Beads 

GTEC Joint Tape 

White perforated, cross fibre paper 

tape. Suitable for hand or mechanical 

application with Lafarge GTEC 

Jointing Compounds. Provides 

superior level of joint reinforcement. 

GTEC Flex Tape 

Cross fibre paper tape with heat 

bonded, zinc coated steel strips for the 

protection of external corner angles. 

GTEC Corner 90º External 

Paper tape beads reinforced with 

galvanised metal, provides clean, 

crisp angles, wax coated to reduce 

paper burr. 

Uses: 

• Flat joints (on walls 

or ceilings) 

• Internal corners 

• Roll length 150m 

Uses: 

• Hand applied 

• Protection of external 

angles (including splayed 

angles and curves) 

• Roll length 33m - in an 

easy to dispense box 

Uses: 


• Protection of 90° external 

angles 

• 2.4m and 3.0m lengths 

• Cut to required length 

using tin snips 

Sealers & Textures 

GTEC Duo & Edging Beads 

Galvanised steel beads for drywall 

corner and edge reinforcement. 

GTEC Universal Sealer 

For use on plasterboard prior to 

paint and wallpaper application. 

Improved whiteness and covering 

power. Equalises the suction of the 

entire surface across board and 

joint. Enables the stripping of 

wallpaper. Prevents plasterboard 

from staining. Does not provide 

a vapour check. 

GTEC Drywall Sealer 

Ivory, pre-decoration coat for 

plasterboard. Equalises the suction 

of the entire surface across board 

and joint. Enables the stripping of 

wallpaper. Can also provide a vapour 

check (15NMs/g), if two coats are 

applied to the plasterboard. Does not 

include a stain inhibitor. 

Uses: 


• Duo bead provides 

reinforcement for 

external corners 

• Edging bead provides 

a finish to plasterboard 

edges 

• GTEC Duo Beads 

available in 2.4m and 

3.0m lengths 

• GTEC Edging Bead 

available in 3.0m lengths 

• Cut to required length 

using tin snips 


10ltr Bucket 

100m² One Coat, 70m² 

Two Coats 

Shelf Life: 12 months 

Drying Time: 1-2 hours 


10ltr Bucket 

100m² One Coat, 

70m² Two Coats 

Shelf Life: 12 months 

Drying Time: 1-2 hours 

For further installation details call Lafarge Literatureline on 0 75 7758 for your free copy 

of the Lafarge GTEC Installation Handbook and to discuss further training opportunities. 




FINISH 

GTEC Cove & Cove Adhesive 

GTEC Cove is a simple and cost-effective way 

of adding attractive and distinctive features to 

wall and ceiling junctions. 

Used on its own, or in combination with plasterboard 

strips, GTEC Cove can complement many different 

room styles. 

To reproduce the appearance of traditional plaster cornices at a small fraction 

of the cost, plasterboard strips can be positioned between the coving and wall 

and/or ceiling. 

GTEC Cove comes in two sizes 

Girths mm Lengths mm 

90 3000 

120 3000, 3600, 4200 

Must be fixed with GTEC Cove Adhesive, gypsum 

based with 40 minute setting time. 

Available in 12.5kg and 5 x 5kg bags. 

Image courtesy of Bovis Homes. 

Cove 0 

Now Lighter! 

GTEC Cove 0 is now even 

lighter, so installation is 

easier than ever! 

GTEC Cove Adhesive 


Gypsum based 

adhesive with 

40 minute 

setting time 

for fast fixing 

of cove. 

For further installation details call Lafarge Literatureline on 0 75 7758 for your free copy 

of the Lafarge GTEC Installation Handbook and to discuss further training opportunities. 

Installation 

Step One 

Using a chalk line strike 

guidelines on ceiling and 

wall to the correct projection 

and depth: 64mm for 90mm 

GTEC Cove, 84mm for 

120mm GTEC Cove. 

Step Two 

Using the guidelines on 

the wall drive in nails at 

1500mm centres to act as 

a temporary support while 

the cove adhesive sets. 

Step Three 

Using a fine-toothed saw cut 

all the pieces of cove 

to length and mitre to fit the 

corners of the room. The 

mitres can be cut using a 

mitre block or template. 

Templates are available from 

Lafarge Literatureline or 

www.lafargeplasterboard. 

co.uk 

Step Seven 

Using GTEC Cove Adhesive fill any gaps between the cove 

and the wall or ceiling. Make good all internal and external 

junctions. 

Step Eight 

Remove all temporary nails once the cove adhesive has 

set and fill nail holes. 

Step Four 

Mix the GTEC Cove 

Adhesive as per instructions 

on the bag. Apply the 

adhesive to the back of the 

cove along its full length on 

the surfaces that meet wall 

and ceiling. 

Step Five 

Sit the lengths of cove 

on the nails and press 

into position between the 

guidelines, carefully lining 

up joints and intersections. 

Step Six 

Clean off surplus adhesive 

with filling knife and smooth 

using a sponge. 

Step Nine 

Using a damp sponge, clean off any adhesive residue from 

the walls, ceiling and cove surface. 

Step Ten 

Apply one coat of GTEC Universal Sealer, or if a vapour 

control layer is required use two coats of GTEC Drywall 

Sealer, and decorate as required. 




FINISH 

Premier Taping Tools 

Premier Taping Tools with GTEC Plasterboard 

Solutions offers tool design expertise and are the 

first choice for drywall tools. 

Careful precision engineering makes Premier Taping Tools 

tough, reliable and built to last, making the job easier and 

more profitable for you. 

Premier Automatic Taper 

Applies tape and jointing compound to flat joints and all inside 

corner joints. 

Premier Corner Roller with Handle 

Embeds tape into 90º inside corner joints on walls and ceilings. 

Premier Corner Finisher ” & ” 

Feathers jointing compound evenly to plasterboard in all 90º internal 

corner joints after using Premier Corner Roller. 

Premier Corner Finisher with Handle 

Used with both 2” and 3” Premier Corner Finishers. 

Manufactured by Premier Taping Tools 

Premier Mudrunner 

Applies the jointing compound to corner joints before and after taping, 

used with GTEC Corner Finisher and GTEC Mudheads. 

Premier Corner Applicator with Handle 

Used with either the 2” or 3” GTEC Corner Finisher to apply finishing 

coat to all 90º internal corner joints. 

Premier Flat Box 7”, 0” & ” 

Distributes the correct amount of jointing compound over flat joints 

automatically ‘crowning’ the joint. 

Premier Flat Box Handles 

Use with GTEC Flat Boxes. Various lengths to suit. 

Premier Easyclean Pump 

Loads all Premier Taping Tools with air-drying 

jointing compounds. 

Premier Gooseneck 

GTEC Easyclean Pump attachment for filling the GTEC Automatic Taper. 



GTEC Fixing Range 

FIX 

GTEC Fixing Range 

GTEC Fixing Range are designed to meet the needs of drywall installation 

and system performance. Precision heads, threads and points mean fast, 

accurate fixing. 

GTEC Fixing Range are purpose-designed to allow efficient fixing of plasterboard to metal and 

timber studs. The extensive range allows for exactly the right screw to be selected for each 

application. That means easier and faster installation and reduced waste. 

Features & 

Benefits 

• Pro-fit recess, no wobbles or 

cam out 

• Exclusive Scavenger Head 

eliminates paper burrs 

• Consistent heat treatment 

• Screw heads don’t shear off 

• Extra high grade steel for 

extra holding power 

• Sharper threads for optimum 

driveablity 

• Designed to exceed 

worldwide building 

standards 

• 23º streaker point for quick 

starting. 

GTEC Self Tapping screws 

For attaching plasterboard to light gauge metal 

wall and ceiling systems. 

• GTEC Self Tapping 

• GTEC Megadeco Self Tapping 

• GTEC Collated Self Tapping 

GTEC High Thread screws 

For attaching plasterboard to timber framework. 

• GTEC High Thread 

• GTEC Collated High Thread 

GTEC Self Drilling screws 

For attaching plasterboard to heavy gauge 

metal and wall ceiling systems 

• GTEC Self Drilling 

• GTEC Pan Head Self Drilling 

• GTEC Wafer Head Self Drilling 

GTEC Specialist Self Tapping screws 

• GTEC Acoustic Floor Self Tapping 

• GTEC Trim Head Self Tapping 

• GTEC Pan Head Self Tapping 

• GTEC Wafer Head Self Tapping 

Tips on Installation 

Manufactured by Grabber 


10 10 

Up to 3mm gap between plasterboards 

Fix positions at bound edges 

of boards 

13 10 


Fix positions at bound edge/ 

cut edge joint 

13 13 


Fix positions at cut edges 

of boards 

GTEC Fixing Solutions have a unique bugle head 

design for fixing plasterboard which eliminates 

paper burrs and provides a flush finish. Extrasharp 

points and high-grip threads result in fast 

penetration through the plasterboard and stud. 

The screws are black phosphate coated and 

lightly oiled for protection against corrosion. 

GTEC High Thread screws are used for attaching 

plasterboard to timber framework. 

GTEC Self Tapping screws are for attaching 

plasterboard to light gauge metal up to 0.7mm thick. 

GTEC Self Drilling screws are for heavy gauge metal 

from 0.7mm to approximately 2.0mm thick. 

Installation 

Drive Screws: 

• at least 10mm in from paperboard edges of plasterboard 

• at least 13mm in from cut edges of plasterboard 

• at least 6mm in from edges of timber framing 

• at least 3mm in from edges of metal framing 

Screws spacing: Partitions, maximum 300mm. Ceilings, 

maximum 230 in the field of the plasterboard, 150mm at 

cut edges and perimeter. Linings, maximum 300mm. 

Drive screws squarely through board and into framing until 

screw head is just recessed. Spot screw heads with jointing 

compound to provide a flush surface. 

GTEC Pan Head screws and GTEC Wafer Head screws are 

used primarily for fixing metal studs and other metal framing 

components together: Self-tapping for light gauge metal and 

self-drilling for heavy gauge metal. 

GTEC Fixing Range

GTEC Deco System 

The Lafarge 

GTEC Deco System 

The Lafarge GTEC Deco System is a complete high quality lining and finishing 

system, saving time and money. The pre-sealed plasterboard with the Deco range 

of joint cements gives a consistent white finish ready for decoration. Use of Deco 

eliminates the requirement for separate sealing of the wallboard prior to decoration. 

Where to use 

Anywhere that uses standard, fire resistant, 

sound resistant, moisture resistant or 

impact resistant board. 

Benefits 

• Eliminates the need for sealer 

• Ready for direct decoration 

• Saves labour 

• Saves time 

The Deco System is unique to Lafarge GTEC Plasterboard Solutions. 

GTEC Deco Boards 

Key: 

Internal Wall 

R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Megadeco 

R 


GTEC Megadeco has one decorative white face with tapered edges 

and a grey faced back liner, suitable for drylining systems that require 

superior acoustic, fire and impact performance. 




R 

✔ NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR R 

✔ ✔ 

NR ✔ GTEC Hydrodeco 

GTEC Hydrodeco has one decorative white face with tapered edges 

and a green faced back liner, suitable for drylining systems that 

require superior moisture resistance such as bathrooms. 




R 


R 

✔ NR R 

✔ ✔ NR R 


R 



GTEC Deco Setting Compound 

GTEC Deco Filler 

GTEC Air-drying Compounds Ready-mixed 

GTEC Fixing 

GTEC Deco Filler is a gypsum 

based compound designed 

for bedding and filling joints 

by hand when using the 

Lafarge GTEC Deco system. 

GTEC Deco Joint Cement 

GTEC Deco Joint Cement is a 

light-weight, ready-mixed compound 

which must be used for the final 

coat of the jointing process and 

can be used for bedding and filling 

when using the Lafarge GTEC Deco 

system. 

GTEC Deco Machine 

GTEC Deco Machine is a lightweight, 

ready-mixed compound 

formulated for use with Premier 

International Taping Tools. As with 

GTEC Deco Joint Cement, GTEC 

Deco Machine must be used for 

the final coat of the jointing process 

when using the Lafarge GTEC 

Deco system. 

The complete range of GTEC Fixings are detailed on page 74. 


12.5kg Bag 

25m² Bedding & Filling Only 


20 kg Bucket 

50m² Full Taping 



Shelf Life: 

4 months 

Shelf Life: 

6 months 


20 kg Bucket 

50m² Full Taping 


Shelf Life: 

6 months 

GTEC Megadeco Self Tapping screws 

A zinc coated drywall screw specifically designed for fixing Megadeco 

wallboard to light gauge metal and ceiling systems. 

• Available in the following sizes from 25mm to 44mm 

• Box quantity: 1000 screws 

GTEC Deco System

Part E: What you need to know 


Part E of the Building Regulations are the new legal 

requirements governing the quality of acoustics in 

buildings where people sleep. 

Part E puts the onus on the builder to demonstrate that 

the stated acoustic rating has been achieved. 

Part E - How to comply 

If you are looking to build... 

• semi detached 

• terraced housing 

• apartments 

• hotels, hostels 

• residential rooms 

Your separating walls, ceiling and floors must 

adhere to the new acoustic rating. 

There are 2 routes you can take 

Pre-Completion Testing (PCT) 

The requirement of Part E calls for sample pre-completion testing of separating 

walls and floors prior to handover. The number of tests required will depend on the 

number of dwellings in each development. Part E states that a minimum of one 

set of tests is required for every ten dwellings of each construction type on a 

development. 

Steps: 

1. You will need to contact a test body which has the appropriate 

third party accreditation. 

2. They will visit and complete acoustic field testing of 10% of all 

separating walls and floors. 

3. Compliance with these performance requirements will be checked 

by Building Control. 

For further information on the PCT, including how to apply for PCT, 

please refer to an acoustic consultant for guidance or Building Control. 

Robust Details Ltd (RDL) 

The use of Robust Details provides an alternative to pre-completion testing. RDL will 

give you a choice of possible construction solutions to comply with Part E. However 

this only applies to new build houses and flats. 

Steps: 

1. Register the property’s use with RDL for each plot and pay a plot registration fee. 

2. Registration documents are then sent to you. 

3. Once the separating walls and floors in each house are completed, fill in the compliance certificate and 

hand it to the Building 

Control body. 

4. Provided the constructions are built correctly this will be accepted by all building control bodies. 

For more information on the Robust Details scheme, including how to apply, contact Robust Details Limited. 

T. 0870 240 8209 Technical 

T. 0870 240 8210 General 

www.robustdetails.com 


Part E: What you need to know


Lafarge has an in-depth and practical understanding 

of what the builder needs – we lead the way in system 

innovation, providing exciting new solutions to ever more 

demanding construction challenges and we strive 

to continually improve and expand our GTEC products 

and systems range. 

Our drywall systems provide 

economic, high performance 

options to meet a wide range 

of building requirements. 

They are ideally suited 

to today’s fast-track 

construction schedules, 

which must control costs 

while maintaining the 

highest quality standards. 

Our plasterboard range and 

drywall systems can meet the 

practical and performance 

needs of all new build 

and refurbishment projects. 

This guide is designed as a 

quick and simple reference 

to the wide range of the 

Lafarge GTEC products 

and systems. We have also 

included some handy tips. 

If you would like more 

information on our stepby-step 

guides or on our 

products and systems 

contact: 

Literatureline 

01275 377582 

Technical Enquiryline 

01275 377789 

www.lafargeplasterboard.co.uk 

Projects Affected 


New Build 

Dwelling-houses and flats 45dB 2 40dB 1 - 62 3 40dB 1 

Residential rooms, hotels, hostels, student 

accommodation 

Conversion - formed by a material change of use 

45dB 2 40dB 1 - 62 3 40dB 1 

Dwelling-houses and flats 43dB 2 40dB 1 - 64 3 40dB 1 

Residential rooms, hotels, hostels, student 

accommodation 

Domestic Extension 

Separating Walls & Floors 

Internal Partitions 

External Walls 

Internal Floors & Ceilings 


43dB 2 40dB 1 - 64 3 40dB 1 

Upgrading of separating wall adjoining to property 43dB 2 40dB 1 - - - 

New separating wall adjoining property 43dB 2 40dB 1 - - - 

The terms that are used 

Domestic Extension 

dB (decibel) A measure of sound reduction 

L nw 

R w 

D nT,w + C tr 

L nT,w 

Laboratory measures of airborne sound transmission 

(higher figure = better performance) 

Site measure of airborne sound with low frequency correction applied 

(higher figure = better performance) 

Site measure of the impact sound level (lower figure = better performance) 

Laboratory measure of the impact sound level (lower figure = better performance) 

Part E: What you need to know

Part E: Separating Walls 

Part E: 

Separating Walls (Robust Detail) 

Cavity Masonry New Build / Conversion 

Sound Insulation Requirements Airborne (min) 

Purpose built dwelling-houses and flats 45 D nT,w + C tr 

Dwelling-houses and flats formed by a material change of use 43 D nT,w + C tr 

Make sure... 

E-WM-4 

or 

E-WM-6 

ROBUST DETAIL APPROVED 

You keep cavity and wall ties free from mortar 

droppings and debris. All blockwork joints are 

fully filled with mortar. 

There is no connection between the two leaves 

except for wall ties and foundation. Chases for 

services are kept to a minimum and filled well with 

mortar. Ensure that 8mm render is applied to the 

complete face of each leaf with a scratch finish. 

• Overall: nominal thickness 316mm 

with maximum height 5.2m 

• Blocks: (E-WM-4) double leaf 100mm 

light-weight aggregate concrete density 

1350-1600 kg/m³ or (E-WM-6) double leaf 

100mm aircrete blocks 600-800 kg/m³ 

• Cavity: 75mm tied with ‘Tie type A’ 

(as Approved Document Part E) 

• Render: GTEC Ecoat 

• Linings: one layer 12.5mm GTEC Standard 

Board or 12.5mm GTEC Megadeco (minimum 

weight 8 kg/m²) or 12.5 mm GTEC E Board 

(minimum weight 10 kg/m²) on GTEC 

Universal Bonding Compound dabs 

Components 

GTEC Ecoat 

GTEC Universal Bonding Compound 

GTEC Megadeco 

GTEC Standard Board 

GTEC E Board 

Part E: 

Separating Walls 

GTEC Metal Stud Partitions New Build / Conversion 




Make sure... 


RSP 

8- 00* 

LPL RECOMMENDED SYSTEM 

The quilt covers the whole wall area without gaps. 

The quilt is compressed between the twin frames. 

You stagger joints in wall linings to avoid air paths. 

You seal all perimeters with GTEC Intumescent 

Acoustic Sealant. 

The wide range of the Lafarge GTEC Metal Stud 

Partitions system allows a repeatable, high level of 

performance across a broad range of applications 

from apartments, cinemas and factories to hospitals, 

museums and schools. 



• Studs: two 50mm GTEC C Studs at 

600mm centres braced horizontally every 

1.5m with GTEC Acoustic V Brace 

• Facings: two layers 15mm GTEC 

dB Board both sides 

• Insulation: 25mm glass mineral 

wool density 16 kg/m³ 

Components 

GTEC C Stud 

GTEC U Track 

GTEC V Brace 

GTEC dB Board 

Part E: Separating Walls

Part E: Separating Walls 

Part E: 

Separating Walls 

GTEC Timber Stud Partitions New Build / Conversion 




Make sure... 

Wall linings are at least 240mm apart. 

RFL 050* 


The quilt or batts cover the whole lining area, 

fitting tight between studs without sagging. 

There is no connection between the two leaves, 

except where ties are necessary for structural 

reasons. 

Timber Stud Partitions are frequently used in timberframe 

houses, in small renovation projects and in 

home extensions where they may be load bearing or 

non-load bearing, depending on specification. 

It is recommended that for superior fixing 

plasterboards be screw fixed direct to timber rather 

than nailed. 



• Studs: pairs of studs 89 x 38mm at 600mm 

centres forming two separate frames set 

50mm apart, braced at every 1.8m height 

with GTEC Fixing Channel or GTEC V Brace 

• Facings: two layers of 15mm GTEC Fire Board 

• Insulation: two layers of 50mm glass 

mineral wool density 16 kg/m³ 

Components 


GTEC U Track 

GTEC V Brace 

GTEC dB Board 

* Separating wall solutions not defined as Robust Details may require pre-completion acoustic testing. 

Please refer to an acoustic consultant for guidance. 

Part E: 


GTEC Acoustic Homespan New Build / Conversion 

Sound Insulation Requirements 

For all non-separating partitions 40 R w dB 

Make sure... 

Wall linings are at least 240mm apart. 


AHSP 

00 


The quilt or batts cover the whole lining area, 

fitting tight between studs without sagging. 

There is no connection between the two leaves, 

except where ties are necessary for structural 

reasons. 

The Lafarge GTEC Acoustic Homespan system 

provides a single solution for all modern domestic 

partition requirements. 

The sound dispersing C Studs provide better acoustic 

performance than timber and the system requires no 

cross-noggings, contributing to reduced installation 

time. 



• Studs: 44mm wide GTEC Acoustic 

Homespan C Studs at 450mm centres 

• Facings: one layer 15mm GTEC Acoustic 

Homespan Board both sides 

• Fire resistance (mins) to BS 476: 30 

• BS 5234 grade: Medium 

• Sound insulation: 40 R w dB 

Components 

GTEC Acoustic Homespan C Stud 

GTEC U Track 


Part E: Internal Partitions

Part E: Internal Partitions 

Part E: 


GTEC Metal Stud Partitions New Build / Conversion 



The wide range of the Lafarge GTEC Metal Stud Partition system allows repeatable, guaranteed performance 

to be achieved across a broad range of applications from apartments, cinemas and factories 

to hospitals, museums and schools. 

RSP 

006 


REP 

00 




• Studs: 50mm wide GTEC 

C Studs at 600mm centres 

• Facings: one layer 12.5mm 

GTEC E Board both sides 


wool density 16 kg/m³ 






• Studs: 70mm wide GTEC 

C Studs at 600mm centres 

• Facings: one layer 12.5mm 

GTEC dB Board both sides 




Components 

GTEC C Studs 

GTEC U Track 

GTEC E Board 

Part E: 


GTEC Timber Stud Partitions New Build / Conversion 



The Lafarge GTEC Timber Stud Partition system are frequently used in timber-frame houses, in 

small renovation projects and in home extensions where there may be load bearing or non-load bearing, 

depending on specification. Plasterboard can be nailed directly to timber or screw fixed, which offers 

superior performance. 

Make sure... 

P A G E 8 6 | L A F A R G E | P A R T E : T H E D R Y L I N I N G S O L U T I O N S E L E C T O R T H E D R Y L I N I N G S O L U T I O N S E L E C T O R | L A F A R G E | P A G E 8 7 

ETP 

00 


You apply GTEC Intumescent Acoustic Sealant 

to the back of the GTEC U Tracks and end GTEC 

C Studs before fixing to wall, floor and ceiling. 

You must ensure the mineral wool quilt thickness 

and density otherwise this will reduce the acoustic 

performance. 

The mineral wool quilt is installed with no gaps at 

the joints and butted up tightly at the perimeter 

- gaps will allow the sound to travel straight through 

rather than being partially absorbed. 



• Studs: 63 x 38mm timber studs at 

600mm centres 

• Facings: one layer of 12.5mm 

GTEC E Board both sides 

• Insulation: 25mm glass mineral wool 

insulation density 16 kg/m³ 




Components 

GTEC E Board 

GTEC U Track 

Part E: Internal Partitions

Part E: Floors & Ceilings 

Part E: 


GTEC Acoustic Floor New Build / Conversion 

Sound Insulation Requirements Airborne (min) Impact (max) 

Purpose built dwelling-houses and flats 45 D nT,w + C tr 62 L nT,w dB 

Dwelling-houses and flats formed by a material change of use 43 D nT,w + C tr 64 L nT,w dB 

RAF 

050 


The Lafarge GTEC Acoustic Floor system is a highly 

efficient means of creating a fully floated construction 

offering excellent protection against airborne and 

impact sound transfer. 

This makes it the preferred choice for multioccupancy 

dwellings, particularly refurbishments. 

• Floor: GTEC Acoustic Floor system using 

18mm tongue and groove chipboard plus 

single layer of 15mm GTEC dB Board 

• Joists: 50 x 200mm at 450mm centres 


wool density 10.5kg/m³ 

• Ceiling: two layers of 15mm GTEC dB Board 

or GTEC Fire Board on GTEC Resilient 

Bar Deep at maximum 450mm centres 

Note: In this system, using 18mm tongue and 

groove chipboard, 57mm gteC trim Head screws 

should be used to fit flooring through plasterboard 

to gteC metal Angle. In cases using 22mm tongue 

and groove chipboard 67mm gteC Acoustic Floor 

screws are recommended. 

Components 





GTEC dB Board 

Ceiling and separating floor solutions not defined as Robust Details may require pre-completion acoustic testing. 

Please refer to an acoustic consultant for guidance. 

Part E: 


Timber Separating Floor New Build / Conversion 

Sound Insulation Requirements Airborne (min) Impact (max) 

Purpose built dwelling-houses and flats 45 D nT,w + C tr 62 L nT,w dB 

Dwelling-houses and flats formed by a material change of use 43 D nT,w + C tr 64 L nT,w dB 

RTC 

050 


In new build and renovation, fixing plasterboard 

to timber joists provides a fast and effective means 

of creating ceilings. Boards can be nailed directly 

to timbers, although screw-fixing provides superior 

performance. 

Incorporation of a GTEC Resilient Bar Deep between 

the board and joist offers further enhanced acoustic 

performance and helps prevent timber movement 

causing cracking along board joints. 

• Floating floor: 18mm tongue and groove 

chipboard bonded with GTEC Wall Lining 

Adhesive to 15mm GTEC dB Board on 

25mm Rockfloor on 15mm Sterling OSB 

• Joists: 200 x 50mm timber 

joists at 600mm centres 


density 10 kg/m³ in joist cavity 

• Ceiling: two layers of 15mm GTEC dB Board 

on GTEC Resilient Bars at 400mm centres 

Components 


GTEC Wall Lining Adhesive 

GTEC dB Board 


Part E: Floors & Ceilings

Part E: Floors & Ceilings 

Part E: 


GTEC Direct to Timber Ceiling New Build / Conversion 


Purpose built dwelling-houses and flats 40 R w dB 

Dwelling-houses and flats formed by a material change of use 40 R w dB 

Make sure... 

RTC 

0 8 


The floor joists are correctly braced with noggings as 

specified - if not adequately restrained, the floor will 

be structurally weak and more prone to ‘squeaking’. 

The holes and notches for services are correctly 

positioned - in the wrong position holes and notches 

will weaken the floor joists. 

When using the GTEC Resilient Bars make sure 

that the board fixing screws do not coincide with the 

floor joists. 

Mark the position of floor joists on adjoining walls 

so that screw fixings can be positioned either side 

of the joists. 

In new build and renovation, fixing plasterboard 

to timber joists provides a fast and effective means 

of creating ceilings. Boards can be nailed directly 

to timbers, although screw-fixing provides superior 

performance. 

Components 


GTEC E Board 

• Joists: 22mm tongue and groove 

chipboard, 47 x 200mm at 

600mm centres with noggings 


wool density 10.5 kg/m³ 

• Ceiling: one layer of 

12.5mm GTEC E Board 

• Fire resistance (mins) to BS 476 

insulation to ceiling void: 0 

• Fire resistance (mins) to BS 476 

integrity to ceiling void: 30 

• Sound insulation 

airborne: 40 R dB w 

The mineral wool quilt between the joists is the 

correct thickness and density. 

The mineral wool quilt is butted up tightly against the 

sides of the joists - gaps will allow the sound to travel 

straight through rather than being partially absorbed. 

Part E: 


GTEC Resilient Bar Deep New Build / Conversion 


Purpose built dwelling-houses and flats 40 R w dB 

Dwelling-houses and flats formed by a material change of use 40 R w dB 

Make sure... 

RTC 

06 


The correct type of GTEC plasterboard has been 

used - the wrong type of wallboard will affect 

performance. GTEC plasterboard are colour 

coded to make life easier. 

The GTEC plasterboard is supported between 

the joists at the perimeter. Battens should be 

used to support the edge of the wallboard to 

prevent sagging. 

All joints are taped and jointed using 

GTEC Joint Cement Xtra and perimeters 

sealed using GTEC Intumescent Acoustic Sealant. 

You plan the board layout to avoid both layers of 

board having coincident joints on the same joist/ 

GTEC Resilient Bar Deep. 

• Joists: 18mm tongue and 

groove chipboard, 47 x 200mm 

timber joists (minimum) at 

maximum 600mm centres 

Components 

• Ceiling: one layer of 15mm 

GTEC Standard Board or GTEC 

Megadeco on GTEC Resilient Bars 

at maximum 450mm centres 

The floor deck is isolated from the surrounding 

walls with a resilient layer - this will improve 

sound performance. 

The joints in the chipboard are glued together. 


GTEC Megadeco Board 



Part E: Floors & Ceilings

Part L: What do you need to know? 

Part L: 

What do you need to know? 

Part L regulation was effective as of the 6 April, 2006. New Part L is an 

upgrade of the Building Regulations 2000 broken down into 4 sections. 

1. L1A is work in new dwellings 

2. L1B is work in existing dwellings 

3. L2A New buildings other than 

dwellings 

4. L2B is work in existing buildings 

not dwellings 

Part L - Focus is on: 

• Conservation of fuel and power 

• Further reducing carbon emissions 

However the whole building envelope must be considered not just individual 

elements. For drywall industry the following two criteria are the most important: 

• Calculate the CO 2 Dwelling Emission Rate (DER), 

based on a Standard Assessment Program (SAP 

2005), is no greater than the Target Emission 

Rate (TER) using a formula which takes into 

account all energy consumption, including the 

effect of solar gain. 

• Limits on design flexibility (limiting U value) and 

fixed building services are compliant. 

Also to be considered are: 

• Part F Air Tightness - Supply air permeability 

test certificate. 

• In conjunction with Part L, Part F also changed 

at the same time because it worked together 

to ensure the overall energy efficiency of the 

building. 

Installation 

• Installers must ensure junction details are 

installed correctly especially at ceilings 

and wall junctions. 

Part L: 

Likely U-value requirements 

Likely U-value requirements Min 

Residential and non-residential new build 

Pitched roof with insulation between rafters 0.13 0.20 

Pitched roof with insulation between joists 0.13 0.16 

Flat roof 0.13 0.25 

Wall 0.20 0.30 

Floor 0.10 0.22 

Windows, door & roof lights 1.50 1.80 

Air permeability 5 10 

In summary 

• Greater cost in professional fees 

• Thermal calculation based on entire envelope 

rather than any individual element 

• Potentially increased use of thicker insulation 

• More emphasis on sealing drafts and air leaks 

Due to the complexity of the building envelope we suggest you contact our Technical Enquiryline 

0 75 77789 to discuss your requirements. Please have your U-value requirements available prior 

to calling to reduce delay. Examples using GTEC Thermal K Boards designed to help meet Part L 

requirements are detailed on page 94 and 95. 

GTEC Plasterboard Solutions has an in-depth and practical understanding of what the builder needs - we 

lead the way in system innovation, providing exciting new solutions to ever more demanding construction 

challenges and we strive to continually improve and expand our products and systems range. 

Our drywall systems provide economic, high performance options to meet a wide range of building 

requirements. They are ideally suited to today’s fast-track construction schedules, which must control costs 

while maintaining the highest quality standards. Our plasterboard range and drywall systems can meet the 

practical and performance needs of all new build and refurbishment projects. 

This guide is designed as a quick and simple reference to the wide range of Lafarge Plasterboard’s products 

and systems. We have also included some handy tips. 

If you would like more information on our step-by-step guides or on our products and systems contact: 

Literatureline 01275 377582 

Technical Enquiryline 01275 377789 



Max 

Part L: Likely U-value requirements

Part L: External Wall Linings 

Part L: 

External Wall Linings 

GTEC Dryliner system New Build / Conversion 

Thermal Insulation Achieved RDS 06 0.30 W/m²K 

RDS 05 0.30 W/m²K 

RDS 006 


RDS 005 


The Lafarge GTEC Dryliner system provides a simple 

means of achieving a flat surface irrespective of the 

condition of the substrate. It also allows the creation 

of a cavity from 20mm to 150mm to accommodate 

services. 


• External wall: 100mm standard concrete 

blocks with 50mm cavity and render finish 

• Internal wall: 100mm standard concrete blocks 

• Lining: 60mm GTEC Thermal K Board on GTEC 

Dryliner Channels at 400mm wider centres 


density 16 kg/m³ 


• External wall: 215mm Celcon 

Standard or equivalent blocks with 

25mm cavity and render finish 

• Lining: 50mm GTEC Thermal K Board 

on GTEC Dryliner Channels at 400mm centres 

Components 

GTEC SR Bracket 


GTEC Dryliner Track 

GTEC Thermal K Board 

Part L: 

External Wall Linings 

GTEC Direct Bond New Build 

Thermal Insulation Achieved RDL 02 0.27 W/m²K 

Note: Rock mineral wool density 33 kg/m 2 may be used in lieu of glass mineral wool as 


RDL 00 


Make sure... 

The dabs for the wallboard lining are continuous at 

the wall perimeter and to door and window frames 

- this helps to seal airpaths behind the wallboard. 

There are continuous dabs of plaster around the 

socket outlets. 

The gap at the base of the wallboard is filled with 

GTEC Intumescent Acoustic Sealant. 

Direct bonding of plasterboard provides a fast, 

efficient means of lining masonry and offers a dry 

solution calling for skills more readily acquired than 

traditional plastering. Extensively used in volume 

house building and smaller projects for more than 

30 years it continues to provide a highly cost-effective 

means of complying with Building Regulations. 



• External wall: 100mm brickwork 

with 75mm cavity 

• Internal wall: 100mm Celcon 

Solar Blocks or equivalent 

• Lining: 60mm GTEC Thermal K Board on 

Direct Bond system with 10mm cavity, using 

GTEC Universal Bonding Compound. 

The thermal lining is the correct insulation type 

and thickness. The different types of insulation 

vary significantly in performance. Installing the 

wrong type and thickness could seriously 

increase heat loss. 

The mineral wool installed between studs 

is the correct thickness, and free from gaps. 

Components 

GTEC Thermal K Board 

Part L: External Wall Linings 

Plasterboard Selector 

A comprehensive 

range of 

plasterboards 

to meet all 

applications 

Technical: Other technical boards are available. 

For further details, please contact our 

Technical Enquiryline on 01275 377789 

See Page: 6 7 6 7 7 7 7 8 8 8 9 9 


Tapered or square edges available 

in a wide range of sizes 

GTEC Vapour Board 

Vapour control lining for ceilings 

and external walls 

GTEC Plank 

19mm board for walls, ceilings and partitions 

GTEC Moisture Board 

Use in bathrooms, kitchens and high moisture areas 


When you need high levels of fire protection 

GTEC E Board 

Designed for use in dwellings as defined by Approved 

Document E regulations. 

GTEC dB Board 

Superior acoustic performance 


Superior acoustic performance 

GTEC Universal Board 

Multipurpose, combining fire sound 

and impact resistance 

GTEC Thermal board 

Bonded to different types of insulation 

to suit a variety of thermal requirements 

GTEC Aqua Board NEW PRODUCT 

Water and mould resistant. Used in wet 

and high humidity areas 

GTEC Megadeco 

Fire, sound and impact resistance with one decorative 

white face with a colour matched jointing system 

BS EN 520 : 2005 Type A N/A A H1 D, F D D, I D D, F, I, R N/A A D, F, I, R 

BS1230: 1985 Type 1 1 1 3&4 5 1 1 1 5 N/A 1 5 

WALL Linings 


system 

✓ ✘ ✘ ✘ ✓ ✓ ✓ ✓ * 

GTEC Dryliner system ✓ ✓ ✘ ✓ ✓ ✓ ✓ ✓ * 

GTEC Independent 

Wall Lining system 

GTEC Linings to 

Timber Frame system 

PArtitions 

GTEC Metal Stud 

Partitions system 

GTEC Acoustic 

Homespan system 

GTEC Timber Stud 

Partitions system 

FLoors & CeiLings 

GTEC Acoustic 

Floor system 

GTEC Dryliner 

Ceilings system 

GTEC Suspended 

MF Ceilings system 


& Corridor 

GTEC Direct to 

Timber Ceilings system 

meAsurements*** 

Thickness (mm) 

Width (mm) 

Length (mm) 

✓ ✓ ✘ ✓ ✓ ✓ ✓ ✓ * 

✓ ✓ ✓ * 

✘ ✓ ** 

✘ ✓ * 

✓ ✓ ✓ ✓ 

✓ ✓ ✓ ✓ 

✓ ✓ ✓ ✓ ✘ ✓ ✓ ✓ ✓ 

✓ ✘ ✓ ✓ ✓ ✓ ✓ ✓ * 

✓ ✘ ✓ ✓ 

✘ ✘ ✘ ✘ ✘ ✘ ✘ ✓ ✘ ✘ ✘ ✘ 

✓ ✘ ✓ ✓ ✓ ✓ ✓ ✘ ✓ ✘ ✘ ✓ 

✘ ✘ ✓ ✘ ✓ ✘ ✓ ✘ ✓ * 

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✘ ✓ * 

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✘ ✓ * 

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✘ ✓ * 

✓ ✓ ✓ * 

9.5, 

12.5, 

15.0 

900, 

1200 

1800– 

3600 

9.5, 

12.5, 

15.0 

900, 

1200 

1800, 

2350, 

2400, 

2700, 

3000 

19.0 

✓ ✓ ✓ ✓ ✘ ✓ * 

12.5, 

15.0 

600 1200 

2400 

2400, 

2700, 

3000 

* Not a typical application. 

** GTEC Universal Bonding Compound must be used. 

*** Not all combinations are available. 

12.5, 

15.0 

900, 

1200 

1800, 

2400, 

2700 

3000 

12.5 

12.5, 

15.0 

15.0 

12.5, 

15.0 

✘ ✘ ✓ * 

✓ ✓ ✓ 

✓ ✓ ✓ 

✓ ✓ ✓ 

✓ * 

✓ * 

22–70 12.5 

✓ 

12.5, 

15.0 

1200 1200 900 1200 1200 1200 1200 

2400, 

2700 

2400, 

2700, 

3000 

1800, 

2400, 

2500, 

2700 

2400, 

2700, 

3000 

2400 

2400, 

2700 

2400, 

2700, 

3000 

P L A S T E R B O A R D S E L E C T O R | L A F A R G E | P A G E 9 6 

Plasterboard Selector

Lafarge Training 

Get in training 

for the year ahead 

Lafarge offers a wide range of training packages 

for our products and systems, either at our fully 

equipped Drywall Training Centre in Bristol or 

with our mobile units we can come to you. 

If required, courses can be tailored to individual 

company requirements. Why not keep abreast 

of the latest drywall developments and installation 

techniques and book today. 

To keep on top of drywall developments and 

ensure your skills are up to date why not book 

into one of Lafarge Plasterboard’s forthcoming 

training courses at our Drywall Training Centre. 

Contractor Training Courses 

• Lafarge GTEC Direct Bond System 

• Lafarge GTEC Metal Stud Partition System 

• Lafarge GTEC Taping and Jointing System 

• Mechanical Taping and Jointing 

• Lafarge GTEC Suspended MF Ceilings System 

• Lafarge GTEC Dryliner Wall Lining System 

• Lafarge GTEC T-Bar Flat Ceiling System 

• Lafarge GTEC T-Bar Corridor System 

Specialist Training Courses 

• Drywall Awareness 

• Technical Support 

• Drywall Site Management 

• Residential, Schools, Hospitals and Cinemas 

For further details please contact our Drywall Training Centre on: 

Tel: 01275 377581 

Email: training@lafarge-gypsum.lafarge.com 

Fax: 01275 377402 



Housing - New Building Systems 

• Lafarge GTEC Direct Bond System 

• Lafarge GTEC Metal Stud Partition System 

Refurbishment Courses 

• Lafarge GTEC Independent Wall Lining System 

• Lafarge GTEC Dryliner Wall Lining System 

• Lafarge GTEC Acoustic Floor System 

Commercial Courses 

• Lafarge GTEC Suspended MF Ceiling System 

• Lafarge GTEC Column and Beam Clip System 

• Lafarge GTEC Shaftwall System 

Specialist Courses 

• Drywall Site Management, Drywall Awareness, 

Customer Service Technical Support 

The Backing of a World Leader 

Lafarge is the world’s largest producer of construction materials, including gypsum 

products, aggregates and cement. The preservation of natural resources and respect for 

the needs of people and the environment are fundamental to the organisation’s business 

approach and philosophy. 

GB Orderline 

For placing orders, delivery enquiries 

and local stockists etc. 

Tel: 0800 7 6 6 

Fax: 0 75 77700 

Email: orderline@lafarge-gypsum.lafarge.com 

Literatureline 

For next day delivery of Lafarge literature. 

Tel: 0 75 7758 

Fax: 0 75 7740 

Email: literatureline@lafarge-gypsum.lafarge.com 

Technical Enquiryline 

Technical advisory service. 

Tel: 0 75 77789 

Fax: 0 75 77456 

Email: enquiryline@lafarge-gypsum.lafarge.com 

Certificate No. FM 13594 Certificate No. EMS 75024 

LAFARGE PLASTERBOARD LTD 

Marsh Lane, Easton-in-Gordano 

Bristol BS 0 0NF 

Tel: 0 75 7777 

Fax: 0 75 777 7 


Plasterboard, jointing and associated products made in the 

United Kingdom by Lafarge Plasterboard are manufactured 

in accordance with management systems certified to 

BS EN ISO 9001: 2000 (quality) and BS EN ISO 14001: 

2004 (environment) 

Ireland Orderline 

For placing orders, delivery enquiries 

and local stockists etc. 

Tel: + 5 (0) 6 0 4 

Fax: + 5 (0) 6 0 7 

Email: irelandorders@lafarge.com 

The Technical Training Centre 

For all drywall training needs from basic 

introduction to advanced skills and development. 

Tel: 0 75 7758 

Fax: 0 75 7740 

Email: training@lafarge-gypsum.lafarge.com 

Wasteline 

Gypsum waste management enquiries. 

Tel: 0 75 77579 

Fax: 0 75 7740 

Email: wasteline@lafarge-gypsum.lafarge.com 

LAFARGE PLASTERBOARD (IRELAND) LTD 

Unit 8, Fonthill Industrial Park, 

Clondalkin, Dublin 

Tel: + 5 (0) 6 6 60 

Fax: + 5 (0) 6 6 679 


The information given in this publication is correct to the best of the publisher’s knowledge at the 

time of print, but users must satisfy themselves as to the suitability of any particular product or 

detail for a specific application. 

DSS / 0408 / AJA

The Drylining Solutions Selector - Howarth Timber

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The Drylining Solutions Selector - Howarth Timber

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