Book Description

Superseded by 2006 edition - see http://www.bre.co.uk/page.jsp?id=677 and this was subsequently superseded by 2019 edition

This is a guide to the use of the relevant U-value calculation procedures to comply with the Approved Documents L1 and L2 (2002) as given in British Standards and other documents, and it will help those who commission and carry out such calculations. It indicates which calculation methods are appropriate for different construction types, and provides additional information and data relevant to typical UK constructions. This guidance is concerned with the U-values of building materials and building elements - walls, roofs, floors, basements, windows and doors - and also covers various issues that commonly arise when undertaking U-value calculations.