INSULATION 41
Icynene, spray applied insulation is “vapour open” allowing the building to breath naturally.
party walls. Spray foam insulation from specialist supplier, Icynene was then applied directly to the exposed stone-work, followed by a proprietary vapor check membrane and plaster-boarding.
SPRAY FOAM INSULATION Icynene is a high performance, spray foam insulation applied using a pressurised gun system. Foams are sprayed as a two-component mixture that come together forming a foam that expands 100-fold within seconds of application, sealing all gaps, service holes etc According to Icynene, traditional forms
of insulation are relatively inefficient in creating a “sealed box” environment, in that they cannot completely fill all voids or seal the interface between the insulation and the building structure. Nor can they cope with small structural movements which will often lead to air gaps. Minimising air leakage is one of the most
effective ways of reducing heat loss in a building, as up to 40 per cent of a building’s heat loss can be attributed to air leakage. For the barn and byre conversion, a similar
studwork treatment, 95mm thick, was applied to external rooms of the barn. Icynene was also used to insulate the roof of the cow byre. Here, additional timber battens were applied to
increase the thickness of insulation whilst still allowing exposure of the original timber roof structure.
WUFI MODELLING Matt Hanna continues; “For both projects, we engaged environmental consultants to run WUFI, hygrothermal modelling tests on our proposals”. WUFI is a computer program that can show how moisture and heat flow affect building materials over time. “The results showed that Icynene was the right product to use” he added. Icynene Foamlite LD-C 50 insulation was used on both projects. FoamLlite is a “vapour open” material that allows moisture vapour to pass freely through it, allowing the building to breathe naturally, resisting cold bridging and condensation. Unlike the urethane foams of 20 years ago,
modern spray foams such as FoamLite use water rather than environmentally damaging petrochemicals as the blowing agent. This means that the reaction between the two components produces CO2
which causes the
foam to expand. As the foam expands, the cells burst and the
CO2 is replaced by air. Consequently, from an environmental perspective, Icynene has a Global Warming Potential [GWP] of 1 and an
Ozone Depletion Potential [ODP] of 0 [Zero]. Icynene does not, therefore emit and harmful gases once cured.
RAPID INSTALLATION Icynene installation contractor, Heatlok, undertook the work on both projects, with spraying completed within a day for the terraced house and roughly three days for the farmhouse and barn. It has been estimated that, if conventional rigid board type insulation had been used on the projects, installation would have taken significantly longer and with less efficient results. Since completing the Bath Terrace and
Wiltshire Barn projects, CASA has gone on to use Icynene on further schemes where high performance:low environmental impact are influencing factors in the construction solution. “CASA’s name embodies our approach to
design and construction” says Matt Hanna. “We aim to create Contemporary and Sustainable Architecture, hence the name (CaSA) and we work incredibly hard to give our clients the best solution with the lowest practical environmental impact”.
https://www.youtube.com/watch?v=xn4ZHQJ LWHM&feature=
youtu.be www.icynene.co.uk
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