Fire safety guide on flat roofing published by TN International

‘FIRE SAFETY Standards in Flat Roofing: A Specifier’s Guide’ has been published by waterproofing specialist TN International as a comprehensive document on the subject, not only for specifiers, but also for building owners – key individuals with fire safety responsibilities – so that they the essential details at hand when specifying and installing a flat roof system.

The guidance sets out the background to this important issue in the industry and explains how to interpret external fire classifications such as BS 476 part 3 and BS EN 13501-5. It also focuses on the in-depth process manufacturers must go through to achieve a Broof (t4) fire rating and further outlines Best Practice advice on how to interpret these fire test results.

In addition to examining the various considerations for both warm and inverted roofs, the guide advises on the fire classes for terraces and balconies, the latter being required construction according to BS 8579:2020. In addition, it is being investigated how the latest cover plates contain innovative graphite technology that helps to prevent the spread of flames on a roof.

TN International’s guide concludes with five key tips for specifiers assessing the fire performance of a particular system, duly pointing out that some manufacturers only have fire test data showing one thickness, such as 120mm PIR, meaning the data can be rejected. if the required insulation thickness is different.

To further simplify the specification process, a handy selection guide for specifying Broof (t4) flat roof systems is included.

*Request a copy of Fire Safety Standards in Flat Roofing: A Specific’s Guide by emailing TN International​ at:

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