NARM has updated its Technical Document NTD03 Application of ACR[M]001 ‘Test for Non-Fragility of Profiled Sheeting Roofing Assemblies’ to GRP Profiled Rooflighting Sheeting.
Now available from the downloads page of this website, this document is designed to provide a straightforward guide for the designer to simplify the specification of GRP rooflights to achieve non-fragility and retain it for 25 years.
This comprehensive document provides results of tests that have established the minimum classifications necessary to ensure reliable non-fragility ratings for properly installed GRP rooflights manufactured by NARM members on purlin spans between 1.35 and 2.0 metres when new, as well as the required classifications to ensure that non-fragility ratings can be expected to be retained for 25 years.
The document covers single skin rooflights, double skin site assembled rooflights, factory assembled rooflights and multi-skin rooflights containing insulation materials.