The test has three limitations which have a direct impact on the performance of installed applications, these include:
1. Tests take place on a prescribed test frame to simulate generally the worst case scenario of a roofing assembly. Assemblies are not tested on the actual roof and should never be tested on the roof after the passage of time to see if they are still non fragile.
2. Tests take place where all the components, fixings, mastic sealants and the structure are new. It is the total assembly that is tested, not just a product on its own.
3. The ACR[M] 001 procedure is clear that there is no measure of time after installation. The assembly is only deemed to be non-fragile when new and does not try to assess when it will become fragile with time.
NARM has advised roofers to put safety before cost when handing a building over for commercial use and take into consideration the fact that roofing elements will deteriorate with time, meaning any further work should be carried out with safety measures put in place.
Link to read the full article by NARM on ‘Understanding rooflights and non-fragility’
For further information, please contact NARM using the contact details on our website, where you will be directed to the appropriate person.
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