INSULATION
65
Better insulation of domestic households is an important way of reducing carbon emissions
Spray applied, open cell insulation Breathable, open cell spray applied foams are highly efficient insulators against both conductive and convective heat loss as they control air movement and eliminate air leakage. Spray applied foam insulation is also extremely flexible; it moves with the structure, maintaining its insulative properties for the lifespan of the building. Spray applied foam insulations such
as HBS-Icynene Foam Lite are open cell materials which have a soft, yielding texture. This not only provides outstanding insulation properties, but also allows the building to breath naturally, resisting internal condensation – particularly important when insulating heritage-type buildings.
Control of air quality. Heat loss through mass transfer is more complex and relates to how much moisture is held in the air (humidity). The more there
is, the more energy it takes to heat it, so to feel warm, damp buildings need more energy than dryer ones. To control humidity, you need to be able to
control the air movement and you can only do this if the building is relatively airtight. Spray foam insulation does this effectively and quickly by sealing air gaps, enabling controlled ventilation and mechanical heat recovery systems to perform efficiently.
A wholistic approach to heat loss mitigation High performance insulation, effective control of air movement and air quality, in combination with low carbon heating are interconnected elements that need to be addressed as-one in the design of new-build housing to ensure heat loss mitigation. Until Building Regulations take a wholistic view of this complex picture, the industry will continue to build housing that perform well in one respect but fail in others
Heat loss occurs through a combination of conduction, convection, radiation and mass transfer
From a wider perspective, bringing the
UK’s legacy of pre-1960’s, poorly insulated housing stock up to a sufficiently high performance is a whole different ball-game, one that needs urgent attention at the highest level.
infouk@huntsmanbuilds.com
www.huntsmanbuildingsolutions.co.uk
ADF JULY 2021
WWW.ARCHITECTSDATAFILE.CO.UK
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