Roof fire safety brochure



TN International’s new roof fire safety guide advises specifiers and building owners.

A comprehensive specifier’s guide to fire safety standards in flat roofing has been launched by waterproofing specialists TN International (TNi).

TNi’s guide, which also advises building owners, looks at the fire safety responsibilities that key individuals have when a flat roof system is specified and installed.

It details the background to this important issue in the industry and explains how to interpret external fire ratings such as BS476: Part 3:2012 and BS EN 13501-5. It also details the in-depth process that manufacturers must go through to achieve a Broof (t4) fire rating and provides advice on how to interpret these fire test results.

As well as exploring the various considerations with both warm and inverted roofs, the guide advises on the fire ratings for terraces and balconies, the latter requiring construction to BS 8579:2020. It also examines how the latest cap sheets incorporate innovative graphite technology which help prevent the spread of flames on a roof.

TNi’s guide concludes by offering five key tips to specifiers who are assessing the fire credentials of a particular system, and warns that some manufacturers only have fire test data showing one thickness, such as 120mm PIR, which means the data can be rejected if the insulation thickness required is different.

A handy selection guide to specifying Broof (t4) flat roofing systems is then provided to help simplify the specification process further.

To request a copy please email