Roof Insulation Fire Rating

There are several more choices of fire rated insulation available.

Roof insulation fire rating.

Roofing fire rated insulation the barrier that does not contribute to fire. Promat fire resistant boards are rated class 0 under the building regulations providing high performance fire resistance in a slimline calcium silicate board. Several gyproc plasterboards also carry the class 0 certification. 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.

Fire tests may be conducted at any one of several recognized facilities. 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. Astm e119 standard test methods for fire tests of building construction and materials is the test standard for determining the fire resistance rating of partitions floor ceiling assemblies roof ceiling assemblies beams and columns. Made from natural stone fire rated insulation is a best way to protect from fire.

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. The maximum flame spread is 6 feet for a class a rated roof 8 feet for class b and 13 feet for class c. 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. 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.

For additional technical information on the fire safety of roofing applications please consult pima s technical bulletin 100 series roofing.