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    HOW FRAGILE IS YOUR FINISHED ROOF ASSEMBLY?

    Hazard elimination is more effective than risk control

    The cause of deaths and subsequent legal proceedings most frequently reported on this website are from workers falling through fragile roofs structures.

    The key to prevention on existing roofs is proper planning, risk assessment and implementation of supervised safe systems of work. However, where new buildings are designed of a major refurbishment project undertaken the elimination of roof fragility is vital.

    Hambleside Danelaw Ltd, a major UK manufacturer of products for the building industry has highlighted the importance of “eliminating anticipated hazards when constructing a roof”. The company rightly point out that:

    “The terms ‘fragile’ and ‘non-fragile’ describe the tested, proven ability of a finished roof assembly to resist the impact of a person falling onto it then to support their weight. The test is strictly prescribed in document ACR[M]001:2014 [Fifth Edition]. There is no margin for error or misunderstanding because someone’s life may depend on it.

    A correctly installed new roof structure which includes in-plane Hambleside Danelaw Zenon rooflights passes the non-fragility test. In fact, Zenon Evolution significantly outperformed it, resisting impact after impact.

    The whole Zenon rooflight range has been subjected to this rigorous test programme and is classed as non-fragile in accordance with the National Association of Rooflight Manufacturers [NARM] Technical Document NTD03 [2014].

    A number of factors will impact on the period of non-fragility which will be achieved by a roofing assembly. Manufacturers can only indicate the expected period of non-fragility. Further guidance is available from NARM and MCRMA.

    Remember: A non-fragile rooflight should be replaced if it is subject to an impact.

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