Flame Resistant Roofing

It s lightweight won t corrode and requires little maintenance.

Flame resistant roofing.

Shingles are categorized into classes that identify their fire resistance. Obviously since wildfires and the fire season has become increasingly worse it is important to note the roofing materials that are the lowest rated. A fire resistant or fireproof roof gives the entire structure a better chance to survive a fire. A one hour rating would mean the structural elements have not yet reached their yield point when exposed to a under deck heat load defined in astm e119 for steel structural members as reaching 1 070 degrees f.

Before choosing a material you should know the fire ratings that are given to each material. And you shouldn t overlook the roof as essential in fire protection since it s extremely vulnerable to sparks blown from wildland fire. Fire resistant roofing materials fire ratings. Concrete is often listed as among the best fire resistant roofing materials too.

Wood shake plywood or particle board roof are the most common roofing types listed as class c. An unrated roof is the most vulnerable the most common example of an unrated roof covering is one made using non fire retardant treated wood shakes or shingles. Class a is the most fire resistant and should be the choice of anyone living in wildfire prone areas. But by including a particular underlying material it can meet the requirements for a class a roof.

Common underlying materials include a type 72 roll roofing material also known as 72 pound felt or 72 pound capsheet material and a panelized gypsum product. Their knowledge and experience can get you the best option for your needs and budget. Fire resistance ratings time temperature include structural elements and everything above including the roof membrane and its surfacing. Expect to pay between 6 50 and 8 50 per square foot installed.

Manufactured using a highly effective fire retardant and underlaid with a fire resistant barrier this assembly is one of only a few synthetic roofing materials to get ul s class a fire rating. Classes b and c denote progressively less fire resistant qualities. Here are a few materials on the market that are effective in withstanding fire. Metal roofing can be made from copper zinc and steel as well as various alloys and comes in a variety of finishes colors and designs.

Class a roofing materials are the most fire resistant. Modern stucco is. The resistance to fire of roofing materials is rated based on a series of tests that is defined by a fire rating. Metal roofing is non combustible and offers class a protection in combination with a fire resistant underlayment.

An exterior fire retardant treated shake roof has a stand alone class b rating. Class c fire resistant roofing material.