Icynene spray foam insulation for high-end new-build
Designed in the style of a barn around an open courtyard area
Exceptional thermal performance and low running costs were key criteria for the construction of a 3000sq ft, new-build home in rural North Yorkshire.
Designed for a private client by Harrogate Architects, Townscape, the high specification property was built in the style of a barn on a spacious, level site, formerly occupied by redundant farm buildings.
Practice Head and Project Architect, Nick Silcock takes up the story. “Planning required that the site was developed to reflect the traditional look and feel of a farmstead with an open courtyard area bordered by buildings that sat comfortably with the rural vernacular”.
Whilst delighted with the old-world, barn-style of architecture created by Townscape, their clients required a much more up to date treatment for the construction methods and long-term performance of the building - particularly relating to thermal efficiency and low running costs.
Townscape looked at various structural solutions and decided on a hybrid, timber frame arrangement with an additional blockwork inner leaf to the gables.
An outer leaf of coursed natural stone in a pale buff/rose shade with sawn stone dressings, together with a blue slate roof was specified - a style common to the village.
Air tightness and exceptional levels of thermal insulation were also required as the clients were keen to minimise running costs and achieve a low carbon footprint. Townscapes solution was provided by careful attention to construction detailing and the innovative use of a spray applied insulation system from Icynene.
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The building was constructed as a hybrid timber frame with masonry outer leaf and additional blockwork to the gables
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 sealing the box, 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% of a building’s heat loss can be attributed to air leakage.
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