Fire Rating Roofing Shingles

Class c fire resistant roofing material.

Fire rating roofing shingles.

Class a roofing materials are the most fire resistant. 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. Classes b and c denote progressively less fire resistant qualities. Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles.

Obviously since wildfires and the fire season has become increasingly worse it is important to note the roofing materials that are the lowest rated. Ul 790 is a quality assurance service listing. 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. Experience maximum flame spread of 13 feet.

Generally most fiberglass shingles have class a fire ratings and most organic shingles such as treated wood shingles have class c ratings. Roofing with a class c rating is able to. But by including a particular underlying material it can meet the requirements for a class a roof. An exterior fire retardant treated shake roof has a stand alone class b rating.

Shingles are categorized into classes that identify their fire resistance. Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram.