March 2022

Roof Windows
Continued from page 62
Left: Keylite’s thermal collar
Right: The company’s roof window
likely because at this level of detail there isn’t
the awareness or the incentive to purchase
extra materials.
If this area is not insulated it can lead to
cold bridging on roof windows – where the
gap between the roof and window creates a
cold section all around the frame due to the
temperature differentiation between the outside
and inside, which contributes toward heat loss
and can eventually lead to condensation and
mould.
To make houses more comfortable and energyefficient,
the onus should be taken away from
the installers and products should be designed
and specified with optimum thermal efficiency in
mind.
Manufacturers should ‘design in’ features that
eliminate thermal bridging, which reduces
the risk of non-compliance and delivers a
build that is closer to the expected energy
performance.
The difference between the on-paper
specifi cation and the as-built performance
often occurs because of attention to detail
and the lack of awareness that a product will
only perform as specifi ed if it is also correctly
installed.
Keylite is aware of the issue surrounding the
Above: Products should be designed and specified with
thermal efficiency in mind according to Keylite.
installation of roof windows and has taken the
lead in ensuring it removes the possibility of this
occurring, ensuring its products are designed
in such a way that contractors don’t have to
consider the ‘gap’ when specifying or fitting roof
windows.
With this principle in mind, Keylite Roof Windows
introduced an Integrated Expanding Thermal
Collar for its products, the only system of its kind
and the only company in the UK to address this
issue.
“The difference
between on-paper
specification and
as-built performance
often occurs [due to]
the lack of awareness
that a product will only
perform as specified
if it also correctly
installed”
Keylite’s thermal collar is already integrated into
the roof window profile, so when on-site installers
can fit with a 20mm gap for ease of installation
and then simply pull the tab on the window to
release the expandable thermal collar, which
then bridges the gap between frame and building
envelope.
This not only saves time and cost for the installer,
but also creates more thermally efficient and
comfortable homes.
Contact Keylite Roof Windows:
01283 200 158
www.keyliteroofwindows.com
@Keylite
64 TI MARCH 2022 PRACTICAL CONTENT FOR THE GLAZING INSTALLER & HOME IMPROVEMENT SPECIALIST