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Not only is low light often a problem in industrial buildings, so is the lack of light diffusion typical with polycarbonate rooflights
Strength & safety
First things first: industrial rooflights should not be walked on. This is not only a safety issue, it may also damage the performance and structural integrity of the roof.
The safety performance of a rooflight must be tested as part of the whole roof assembly, including all components needed to install it and the roofing system it is installed in. Hambleside Danelaw’s high- strength Evolution GRP rooflight, through rigorous testing in accordance with Advisory Committee for Roofsafety (ACR) recommendations, is designed to deliver systems achieving Class B non-fragility for 30 years – the highest standard a rooflight installed in a metal roof system can achieve. The service life of a rooflight is dependent on several factors, most importantly the rooflight assembly or configuration. Technological developments have led to the introduction of thinner, lighter GRP sheets which can give an expected service life of 30 years without compromising light performance, while it is
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generally accepted that the current market standard for service life is a minimum 25 years. Unfortunately, there are systems on the market that fall below this requirement as they either use configurations developed decades ago or materials that are not as durable as GRP.
The combination of a long service life and long period of non-fragility offers real benefits to building owners and those accessing the roof, enhancing safety and reducing lifetime costing.
In order to realise all the potential outlined above, the importance of choosing the optimum rooflight configuration for your building and your requirements cannot be overstated. It’s good practice to speak to your rooflight manufacturer for information on all the factors listed here, as well as to get a clear statement on both non-fragility classification and service life expectancy.
William McDowell is national business development manager at Hambleside Danelaw
ADF FEBRUARY 2021
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