Fire Rating Of Roof Systems

A class a roof is ideal for fire protection and may be required by your building codes depending on your place of residence.

Fire rating of roof systems.

Ib roof system s products are specifically engineered for strength and our pvc roofing membranes far surpass the minimum astm standard 200 lbf in. The maximum flame spread is 6 feet for a class a rated roof 8 feet for class b and 13 feet for class c. 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. 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.

Our roof systems are rated by code for external fire resistance under deck exposure and time temperature resistance. Fire ratings for roofs are classified as either class a class b class c or are unrated if a roof covering cannot meet the requirements for any of these classifications. These assemblies need to meet fire and smoke safety and environmental sustainability requirements. Class a class b class c or unrated.

Your roof can have one of four fire ratings classifications. Underwriters laboratories has defined the ul 790 standard tests of roofing material fire resistance to external fire sources. Roofing systems are rated by realistic fire tests. 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.

Rating having a minimum typical breaking strength of 332 lbf in. 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. We must emphasize however that individual roof components are not rated at all. Fires that originate outside of the structure itself.

Class a is the highest rating offering the highest resistance to fire and unrated is the worst. Iko fire rated roofing systems include those designed to handle extreme temperatures and to mitigate fire.