Fire Rating Roofing Shingles

Class c fire resistant roofing material.

Fire rating roofing shingles.

Class c roofing provides only light fire protection. Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles. Generally most fiberglass shingles have class a fire ratings and most organic shingles such as treated wood shingles have class c ratings.

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

Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Classes b and c denote progressively less fire resistant qualities. Wood shake plywood or particle board roof are the most common roofing types listed as class c. 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.

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. Class a roofing materials are the most fire resistant.