41 Case study 12 Hanham Hall, Gloucestershire Contributed by Paul Newman Kingspan Timber Solutions paul.newman@kingspan.com Name of project: Hanham Hall Town or city: South Gloucestershire Brief description: Range of one to fi ve bedroomed properties: in all, 185 properties. Total cost: not supplied Average cost per unit: not supplied Principal partners: Barratt Development (client), HTA Design LLP (architect), Barratt Homes, Sovereign Housing Association, Kingspan Timber Solutions Length of time to build: About three years Were there any additional/ unusual approvals needed and what were they? Zero carbon development needed to meet demanding requirements of ‘Carbon Challenge’. Briefl y describe the construction method Structural insulated panels (SIPs). In a typical external wall construction, a vapour barrier was stapled to the external face of the Kingspan TEK Building System panels followed by timber cladding fi xed on battens. Then, 25mm-thick Kingspan Insulation Thermawall TW55 was installed internally, helping to further reduce both heat loss and thermal bridging, followed with a service cavity and a layer of plasterboard. This internal build-up was also used for the roofs. Why was this method chosen? High performance characteristics of Kingspan TEK Building System and established track record in assisting projects reach the top standards in building performance. The constructions also achieved outstanding thermal performance, with a typical roof and wall U-value of 0.11 Wm2/K, whilst the Kingspan TEK Building System’s unique jointing system helped maintain air leakage rates below the target maximum of 1.5 m3/m2/hr @50 Pa.
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