ABSTRACT
Timber frame is the second most popular construction method for homes in England and Wales, with 15% of UK housing output. The timber frame is usually manufactured off-site to different levels of completion either as an open or closed panel. Timber is approximately five times more conductive than insulation, so more timber results in poor thermal performance. This chapter highlights good practice detailing for timber frame with emphasis on thermal performance. It examines in more detail two types of timber frame construction, closed panel and twin stud. Thermal bridging can be reduced by adding an extra layer of insulation to the outside of the timber frame. Continuous insulation around a timber frame is important to ensure no thermal bridging through the timber. Timber twin stud panel fixed to aerated concrete block upstand providing continuous insulation layer at the base junction. The upstand must be covered on the inside with an airtight membrane and taped to the concrete screed.
