Class a class b class c or unrated.
Fire rating of roof systems.
Roofing systems are rated by realistic fire tests.
We must emphasize however that individual roof components are not rated at all.
Your roof can have one of four fire ratings classifications.
Roof covering packaging that encloses shingles or other roofing that have a fire rating will display the level of fire or wind resistance rating of the materials.
These assemblies need to meet fire and smoke safety and environmental sustainability requirements.
Over non combustible roof decks such as steel poured gypsum or concrete only the spread of flame on the top surface of the roof system is evaluated.
Fires that originate outside of the structure itself.
Rating having a minimum typical breaking strength of 332 lbf in.
Building code fire resistance requirements building codes establish fire resistance requirements for roofs based on the type of construction e g concrete steel wood for the building.
Our roof systems are rated by code for external fire resistance under deck exposure and time temperature resistance.
Class a is the highest rating offering the highest resistance to fire and unrated is the worst.
The prevent line of polyester reinforced or composite fire rated cap sheets provide an extra protective coating and line of defense to iko s premium asphalt based roofing systems.
The maximum flame spread is 6 feet for a class a rated roof 8 feet for class b and 13 feet for class c.
Ib roof system s products are specifically engineered for strength and our pvc roofing membranes far surpass the minimum astm standard 200 lbf in.
Fire rated wall floor and ceiling assemblies provide the necessary fire and smoke barriers to create compartmentalization during a fire safeguarding against the spread of fire and smoke within a building or to and from a building.
Metal is a safe and environmentally responsible choice for a fire resistant roof classic metal roofing systems the leader in producing fire safe roofing for residential applications manufactures products that are 1 20 the weight of most tile products and eligible for class a b or c fire ratings as determined by roof preparation.
Underwriters laboratories has defined the ul 790 standard tests of roofing material fire resistance to external fire sources.
Tested roof systems are fire classified class a b or c where the most fire resistant roof assemblies are class a and class c is least resistant.
