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Report BR 443 Conventions for U-value calculations
Publication Year
2019
Document Status
Current
Abstract
Appropriate British, European and international standards used to establish the measured values of thermal transmittance (U-value) and thermal resistance (R-value) of a construction layer by numerical calculation, focussing on new building elements such as walls, roofs, floors, windows and doors.
Document History
Third edition published November 2019; incorporating the April 2021 update to Section 11.1. Supersedes the 2006 second edition. First published in 2002.
Author
Anderspn, B. and Kosmina, L.
Publisher Information
BRE
BRE is a building science centre that generates new knowledge through research. This is used to create products, tools and standards that drive positive change across the built environment. BRE helps its government and private sector clients meet the significant environmental, social and economic challenges they face in delivering homes, buildings and communities. BRE is owned by the BRE Trust, a registered charity. The Trust uses the profits made by the BRE companies to fund research and education that advances knowledge of the built environment.
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