Cromar Building Products Ltd. Cromar roof tile underlays. Cromar breathable membranes for use in cold non-ventilated roofs. Product sheet 4
Certificate 10/4748
Document Status
Current
Supplement
Core Supplement
Series
Certificate
Abstract
Relates to breathable membranes for use in cold non-ventilated roofs of up to 70 degrees of pitch in dwellings. Key factors assessed were mechanical resistance and stability, fire safety, hygiene, health and the environment, safety and accessibility, protection against noise, energy economy, sustainability, and durability.
History
Date of third issue: 13 February 2025. Originally certified on 21 October 2022.
Subjects
- Roofs
- Sarking/roof lining
- Building structure
Publisher History
The British Board of Agrément have been providing authoritative and independent information on the performance of building products for over 40 years. The certificates they produce contain data on durability, installation and compliance with Building Regulations.
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.