Current
Core Supplement
Technical Document
Guidance on typical centre pivot roof window and top hinged roof window installation and detailing pitfalls; addressing sizing, coursing, underlays, levelling and squareness, flashings and insulation.
2018 edition. Supersedes the NARM 2018 edition.
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.
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.
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.