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Technical Document NTD02.1 Assessment of thermal performance of out of plane rooflights
Publication Year
2022
Document Status
Current
Abstract
This document updates the 2021 version of NTD02 to reflect the changes of BR443 and the 2021 version of Approved Document L in England. Defines Ur and Urc values, based on the developed area of the rooflight, why their use rather than Uroof_opening-value is appropriate for use as the limiting value in building regulations, why they should be calculated for out-of-plane rooflights, and for rooflight-and-upstand assemblies.
Document History
2022 edition. Supersedes the NARM Technical Document NTD 2.1 (2022).
Publisher Information
The Rooflight Association
The trade association representing the UK’s rooflight industry develop standards and codes of practice in the provision of natural light in built environments. Publications cover all aspects of rooflight design, specification and installation. They were formerly known as NARM, the National Association of Rooflight Manufacturers.
Cawley Priory
South Pallant
South Pallant
Chichester
RA
UK
Website: https://rooflightassociation.org/
