November 2018

Tapered Insulation
“Often we come across
buildings that are not
always full of right
angles, and for these
instances the installer
may need to cut a
bespoke angle on site”
Above: With every bespoke tapered insulation project designed and specified by TaperedPlus, a full scheme drawing showing
design falls will be issued and approved prior to the delivery of the insulation to site.
Tip 3: The good practice method
As an established roofing contractor, the same
good practice methods should also be applied
with the use of day joints, ensuring the system is
not subject to any moisture between installation
breaks (e.g. at night, over weekends etc.)
With multi layered tapered systems, staggering
the joints when installing the insulation is a
practical must. With any type of flat slabbed
insulation, staggering the joints improves the
system’s stability and performance whilst
eliminating the risk of cold spots between the
deck and the membrane.
“Taking measurements
from the design will
enable the installer to
chalk the line onto the
deck, mirroring the
angles that need to be
cut in the tapered
insulation”
Timber hard edges again are a must when
complying with a good method of practice. These
help to protect the edge of the tapered insulation
from being crushed by foot traffic or other roof
trades during and after the installation.
Timber hard edges are normally 5mm thinner
than the adjacent insulation board; this allows
an easy dress down detail of the membrane
and ensures the life expectancy of the
waterproofing system.
Tip 4: Hip & Valley mitre lines made simple
Tapered insulation systems are specified for
many reasons. One of the main advantages is
having the ability to drain a flat roof of its
rainwater in several directions in one complete
layer of insulation. Systems designed and
supplied by TaperedPlus can be provided with
factory pre-cut mitres. These are provided for 45-
degree angles in both a Hip and Valley variation.
They are also clearly marked with directional
arrows on all scheme designs. Just check the
arrows are on all mitred boards.
Quite often we come across buildings that are not
always full of right angles and for these instances
the installer may need to cut a bespoke angle on
site. Now, without hiding behind the nearest tank
room, cutting this angle is not as tasking as it
looks on paper. As long as you have a tape
measure and chalk line, this process can run as
smooth as installing any factory pre-cut mitre.
Taking measurements from the design will enable
the installer to chalk the line onto the deck,
mirroring the angles that need to be cut in the
tapered insulation.
Tip 5: Saving the offcuts
All multi-layer tapered insulation designs will
show an insulation section build-up. These will
include any packer boards needed or show how
tapered board layers can be overlaid or underlaid
with a uniform insulation thickness.
Tapered boards are typically supplied in their full
form and like any installation of ridge slab type
insulation, a certain amount of on-site cutting is
required by the contractor. It is important for the
“A certain amount of
on-site cutting is
required by the
contractor. It is
important for the
installer to save all offcuts
until the complete
scheme has been
installed”
installer to save all off-cuts until the complete
scheme has been installed. At TaperedPlus we
aim to reduce any waste where possible. Saving
all offcuts could also enable the correction of any
unforeseen circumstances that may occur.
We offer pre-onsite meetings with roofing
contractors prior to installation, alongside always
being available to discuss any scheme designs over
the telephone / email, answering any questions.
Who better than to talk to the designer themselves
to make the installation process trouble free?
“Especially with new
build projects,
variations may occur
where the ‘as built’
structure varies from
the architectural
plans”
Contact TaperedPlus
01642 677342
www.taperedplus.co.uk
@TaperedPlus
54 TC NOVEMBER 2018