The Bushels

Kingspan cavity wall insulation is helping to insulate a rural development of affordable homes.

The Project

Mosterton is set within one of the most desirable and expensive rural areas in the country with average house prices exceeding £300,000. The Bushels housing development offers 36, much needed, one – four bedroomed homes to the village. It has been carefully designed by Acheson Construction in collaboration with Boon Brown Architects to ensure it fits seamlessly within the local architectural style. This includes the use of a range of traditional materials including natural slate tiles, brick and reconstructed stone cladding. 

Dorset, UK
Kingspan Kooltherm K108 Cavity Board
Social Housing Provider:
Design & Build Contractor:
Acheson Construction
Boon Brown Architects
Affordable to run
In addition to ensuring the homes were priced reasonably, the project team were also keen to ensure the homes used heat efficiently and would support the health and wellbeing of its future residents. This farsighted approach led to the specification of Kingspan Kooltherm K108 Cavity Board within the homes.
With a thermal conductivity of just 0.018 W/mK, the cavity wall insulation allowed the project to achieve compliant external wall U-values with an insulation depth of just 75 mm. The board’s reflective, low emissivity foil facing also increases the thermal resistance of the cavity, helping to retain heat during cooler months and reflect away solar radiation in the summer to guard against overheating.
As part of our mission of giving everyone the opportunity to have a place that they can call home, we also want to make sure that we are employing energy efficient and innovative solutions where possible across our schemes. By using technology like Kingspan’s not only are we able to reduce the carbon emissions emitted from our homes but it also makes it cost effective for our customers. Given that affordability is a main concern for areas like Mosterton, affordable homes like ours make it possible for local people and young families to remain in the community and close to their families, but also be proud of where they live and the place they call home..

Patrick Chauvin, Executive Director of Assets, Stonewater
Suitable for severe conditions
Under the NHBC and Zurich Building Insurance Technical Standards, the partial fill cavity board is acceptable for locations which will be exposed to very severe driven rain with a residual cavity width of 50 mm providing the outer leaf is fair faced masonry with tool flush joints. In more sheltered areas, this can be reduced to a minimum of 25 mm for buildings under 12 metres.

This excellent thermal performance allowed Acheson Construction to keep external wall construction depths to a minimum, maximising living space within the available plots for the homes. Window reveal depths could also be kept slimmer than would have been possible with a lower performing insulant, helping to increase natural light levels within the homes. 

Kingspan Kooltherm K108 produced at Kingspan Insulation’s Pembridge manufacturing facility is certified to BES 6001 (Framework Standard for the Responsible Sourcing of Construction Products) ‘Excellent’


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