Latest news and articles
New guidance on non-fragility for specifiers of in-plane rooflights
NARM, The National Association of Rooflight Manufacturers, has issued a guidance document covering non-fragility, for specifiers of in-plane rooflights.
There are two commonly used materials for in-plane rooflights: GRP (Glass Reinforced Polyester) and Polycarbonate.
GRP offers naturally diffused daylight, and is extremely stable, unaffected by most aggressive chemicals, with a low coefficient of thermal expansion and high resistance to permanent stress
Polycarbonate is a high performance material, offering high levels of light transmission. It is extremely strong and is well suited for in-plane rooflights when treated correctly.
The Health and Safety Executive clearly states that persons responsible for the design of a roof structure should consider carefully the potential to eliminate or reduce the hazard of using materials which are of a fragile nature.
Both in-plane rooflight materials can be specified to be non-fragile when new. The new NARM document details the considerations regarding long term non-fragility.
Copies of the new document can be downloaded here.