Fm approvals is a leader in certification and approval of roof assemblies.
Fm rating roof.
Material flammability tests and a room fire test are required for all interior walls and ceilings that are inert faced anything with a metal or plaster finish.
Through fm approved products you get a roofing system that has been proven in extensive testing to perform as specified including wind uplift fire resistance and many other factors.
Fm approval of interior wall and roof ceiling systems to approval standard 4880 requires testing for limited fire spread and fuel contribution.
Because fm approvals requires a 2 1 safety factor roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the maximum for 1 75 ratings etc.
Take the guesswork out of an fm approved roof roofnav can take the guesswork out of configuring an fm approved roofing system leaving you to focus on what matters most.