Design and drawn by Tom Foster www.tomfosterarchitecture.co.uk
Description: This project tackled the problems of a restricted site with limited access. An innovative timber foundation and timber frame super structure, less than 1/2m3 of concrete was used in the substructure to form leveling pads that supported reclaimed Jarrah crossing sleepers as foundation beams with timber joists and timber frame superstructure above.
The new extension incorporated an insulated foundation using 400mm of Lecaexpanded clay,with Tom Foster’s hybrid wall construction of 150mm timberframe with Osb3Smartply external sheathing and plasterboard internal and fulfilled with Warmcell500and externally bonded 150mm EPS70 coated in Parex lightweight render system.
IndicativeUvalue 0.14W/m2K
Roof construction is similar to walls with corragatedcoatedsheetcover. Cold bridging was addressed by connecting seamlessly theouter layer of150mm EPS which also connect to the insulation from thefoundations.
Windows and doors were triple glazed UPVC