Assessment of thermal performance of out-of-plane rooflights (Withdrawn)
Technical Document NTD02
Document Status
Withdrawn
Supplement
Core Supplement
Series
Technical Document
Abstract
Details how to calculate Ud-values for the developed area of the rooflight to be compliant with limits stated in Building Regulations. Includes details of how the surface area of out-of-plane rooflights should be measured but not how to calculate heat loss through a sample, or the calculation of true U-value.
History
Superseded by NTD 2.1 Assessment of thermal performance of out of plane rooflights (NARM, 2022). NARM Technical Document NTD 2 (2010).
Subjects
- Windows and doors
- Thermal insulation
- Special subject areas
- Lighting, natural
- Environmental issues/energy
- Rooflights
- Energy efficiency/Energy Management
Publisher History
Developing standards and codes of practice in the provision of natural light in built environments, NARM represents UK designers and manufacturers of rooflights from polycarbonate domes and barrel vaults, to GRP factory rooflights and structural glass skylights and atria. Now known as The Rooflight Association.
Information
NBS
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
Accuris
We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.