For the traditionally designed Alvington Place housing development in Alvington near Yeovil, Somerset, insulation was needed that could be relied upon to deliver superior thermal efficiency at the right price. Having used Celotex’s renowned insulation boards in the past to great success, developer Strongvox opted to use them again on the cavity walls of the scheme. <br> <br> Strongvox selected 50mm Celotex CW4000 for the cavity walls of the homes at Alvington Place. The thermal properties of the product have made it a consistently popular choice with architects and specifiers. Made from PIR (polyisocyanurate) with foil facers for improved emissivity, Celotex says that it offers an impressive lambda value of 0.022 as well as BBA (British Board of Agrement) certiIcation and an ‘A+’ rating when compared to the BRE Green Guide 2008.The boards also hold uniform thermal performance across the product for supremely reliable performance, Celotex claims.<br> <br>