Roof Insulation Fire Rating

Promat fire resistant boards are rated class 0 under the building regulations providing high performance fire resistance in a slimline calcium silicate board.

Roof insulation fire rating.

In europe there are more than two million fires in buildings and industrial installations every year and they are responsible for more than four thousand deaths and billions of euros of damage. Roof insulation fire performance before the latest amendments to adb the key fire consideration for flat roofing was requirement b4 which covered the resistance to fire from the outside of a roof system where achieving f ac to bs476 3 in the past and now b roof t4 gave unrestricted distance to the boundary of the building. Several gyproc plasterboards also carry the class 0 certification. There are several more choices of fire rated insulation available.

The correct specification and installation of building products and materials including insulation is critical to achieve fire safety and minimise the development and spread of fire. Icynene spray foam insulation products have the flame spread and smoke developed indexes required have been tested in accordance with and comply with the acceptance criteria of nfpa 285 and there are many wall and ceiling assemblies that contain icynene products and are fire resistance rated in accordance with astm e 119. Icynene is committed. Wall applications exterior walls of any height on commercial buildings ibc types i iv that contain polyiso insulation or any other foam plastic insulation must be evaluated for full assembly fire performance per nfpa 285.

Fire tests may be conducted at any one of several recognized facilities. While foam insulation is generally more costly than other insulation options it does have higher r values and is fire rated as this particular contractor is a friend of mine i dropped him back this question spray foam insulation is fire rated to this he replied yes some are tiger makes one. For additional technical information on the fire safety of roofing applications please consult pima s technical bulletin 100 series roofing. The maximum flame spread is 6 feet for a class a rated roof 8 feet for class b and 13 feet for class c.

The slope of the test specimen is preselected and since steeper slopes are more of a challenge due to melting material feeding the fire the rating applies to the maximum slope passed.