Refurb Projects August 2020

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CLADDING Magply Plaster Bond demonstrates its key benefits in Essex barn conversion The Plaster Bond treatment from building materials specialist, Magply, has been employed as part of the specification for the renovation and conversion of an old agricultural building at a property in Essex. The 200 year old single-storey building has been transformed into office accommodation by a local building company, lining the rustic timber and stone construction throughout using the manufacturer’s high performance Magply MGO boards to create a sound and level surface. The fire resistant, highly moisture stable boards were then given a roller applied coating of the new mineral based Magply Plaster Bond, prior to being finished with a conventional one-coat gypsum skim. The versatile new primer has a potassium silicate formulation suitable for most common building substrates and can be applied by brush or roller to create an even, but slightly gritty surface offering a strong mechanical key for a range of plaster types, including lime based finishes. The owner of the property commented: “While the timber trusses and general structure to the barn were in reasonably good condition, the walls were very irregular and we also wanted to conceal the underside of the roof coverings, so our architect selected the well-proven Magply MGO boards to provide a flat and stable, fire resistant lining and although the 9mm boards are routinely used as a substrate for render treatments or tiling, when the company’s technical department heard we wanted to create a crisp plaster finish, they suggested applying a coat of the Magply Plaster Bond “ Not only were the boards easy to cut to shape and fix, but the bond coat was very straightforward to apply and gave our builder extra confidence in plastering the interior.” Independently tested by Sheffield Hallam University and PRA Coatings for vapour diffusion, Magply Plaster Bond is therefore proven not to trap water vapour within the fabric of a building. Additionally, the potassium silicate based primer coat is VOC free and odourless and contains no other cobinders such as solvents, gypsum or cement, making it non-hazardous. Applied by broad brush or roller using short strokes, the product gives a coverage rate of approximately 500g/m2 or some 35m2 from one of the 17 kg recyclable containers. Appropriate vapour open plasters can then be applied at any point after a 24 hour curing period. www.magply.co.uk 8 AUGUST 2020, REFURBISHMENT PROJECTS
CLADDING Specifying Commercial Cladding Refurbishment James Burton, Sales Manager at specialist coating manufacturer Bradite, advises what to consider when refurbishing commercial and industrial cladding. Cladding - the profiled exterior and predominately metal finish to industrial and commercial buildings, is mostly coated in the production process which gives it a life of approximately 20 years before it starts to discolour. Both flexible and adaptable, it can be over-painted at any point during its lifetime, the process normally being relatively quick with minimal disruption. SUITABLE SURFACES Most of the commonly encountered external cladding on buildings can be over coated using Bradite One Can which is both primer and finish, with excellent adhesion and anti corrosive properties. Steel and nonferrous metals must be properly prepared and primed while wood, fibreglass, concrete and mineral substrates should be free of contamination, dust and efflorescence. Suitable existing epoxy and polyurethane coatings should be cleaned and abraded as necessary. Most external cladding will last for a period of between 10 and 20 years before any maintenance is needed. The deterioration is usually gradual and will move from simple chalking or colour fading, to failure of the coating. This is followed by corrosion of the protective zinc or aluminium alloy under the decorative coating and finally by failure of the steel substrate itself. When the steel substrate itself has failed, it is usually by perforation or excessive steel thinning by corrosion. This is when the cladding needs to be replaced. Up until the corrosion and failure of the steel substrate itself, Bradite’s One Can can be successfully used to upgrade the cladding and extend its life by up to 10 years. Bradite One Can is a cross linking, anti corrosive water thinned coating that’s easy to apply and can offer a 10- year maintenance cycle. Full BS 4800, RAL and NCS Colours are available, while specific corporate colours can be achieved by using Bradite’s extensive colour mixing database and can match specific corporate colours. ATMOSPHERIC EXPOSURE CONDITIONS In an Industrial environment, corrosion is mainly caused by a high level of airborne sulphur dioxide or other pollution from industrial and domestic processes combined with high moisture levels. In a Marine environment, corrosion is mainly caused by a high level of salt, carried as salt spray and combined with high moisture levels. Salt spray can be carried up to 3 kilometres inland depending on the prevailing winds. One Can has proven excellent performance in both of these exposure conditions. SPECIFICATION It is essential to ascertain that current cladding coating still has good adhesion, before over coating. This can be checked by carrying out a cross hatch adhesion test on a sufficient number of elevations (differently exposed elevations may give different results). Where the adhesion is insufficient, the elevation should be completely stripped of old coating, before applying three coats of Bradite One Can, intact areas will only require two full coats, with recoat possible after one hour projects can be completed in shorter time making use of weather conditions and meaning less downtime and more profit. PREPARATION As in any decorating project, good preparation is the key to a successful finish. Bradite recommends high pressure water cleaning to remove all loose and flaking paint, salts and other contaminants. A detergent like Bradite TD39 should be used combined with scrubbing and high pressure water cleaning to remove any oil contamination not removed by high pressure cleaning alone. Rusted and damaged areas should be mechanically or manually prepared to SIS St 3, clean metallic appearance with little or no rust present. An intact area of galvanised steel or aluminium substrate should be primed with a first coat Bradite One Can. Care must be taken to ensure that the minimum thickness given in the available data sheets is achieved on the edges of the cladding profile as well as the flat surfaces. It is advised that application by brush and roller may not achieve the required dry film thickness and may then require extra coats. Application of the surface coating should always be avoided under adverse weather conditions and in particular, low temperatures. Rain on the surface shortly after application can affect the final appearance. Application should also be avoided in areas exposed to direct sunlight as this may accelerate the drying and affect the application. ADDITIONAL PREPARATION AND PROCEDURES The life of all protective systems can be prolonged by ensuring that the dry film thickness of the paint system on all welds, sharp edges, bolts, nuts and other fixings is at the correct level. This can be achieved by giving extra stripe coats of each coat to more sensitive areas. For improved performance, all welds and sharp edges should be mechanically ground to a radius of 2mm or more and all pittings filled by welding or with the use of a suitable filler. www.bradite.com REFURBISHMENT PROJECTS, AUGUST 2020 9
Page 1 and 2: REFURB PROJECTS THE JOURNAL OF REPA
Page 3 and 4: C O N T E N T S Partnership approac
Page 5 and 6: CLADDING are more varied with a mix
Page 7: GLASS & GLAZING High performance se
Page 11 and 12: SOCIAL HOUSING Plans For Unique Ret
Page 13 and 14: SOCIAL HOUSING New affordable homes
Page 15 and 16: Enquiry Number 12 at www.modbs.co.u
Page 17 and 18: TIMBER BUILDINGS Timber Frame: Acco
Page 19 and 20: Endurawood: new range of aluminium
Page 21 and 22: PROJECTS SCI partners with Siemens
Page 23 and 24: PROJECTS Partnership approach sees
Page 25 and 26: PROJECTS New research unlocks the k
Page 27 and 28: PROJECTS Waterfront development at
Page 29 and 30: Derby set for new 3,500 capacity ve
Page 31 and 32: PROJECTS Preserving history at the
Page 33 and 34: Community Centre - a City Gate Ense
Page 35 and 36: ENERGY EFFICIENCY New Glow-Worm fil
Page 37 and 38: INTERIORS Bespoke Stone Fabrication
Page 39 and 40: ROOFING Marley adds integrated sola
Page 41 and 42: SUSTAINABILITY Can a Green Roof ren
Page 43 and 44: Aggregate Industries welcomes ‘Vi
Page 45 and 46: PRODUCTS & SERVICES DIRECTORY BUYER
Page 48: egen 2020 St. George’s Hall, Live

Refurb Projects August 2020

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