Fire Rating Roofing Shingles

Ul 790 is a quality assurance service listing.

Fire rating roofing shingles.

Wood shake plywood or particle board roof are the most common roofing types listed as class c. But by including a particular underlying material it can meet the requirements for a class a roof. Classes b and c denote progressively less fire resistant qualities. Obviously since wildfires and the fire season has become increasingly worse it is important to note the roofing materials that are the lowest rated.

Generally most fiberglass shingles have class a fire ratings and most organic shingles such as treated wood shingles have class c ratings. Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles. Class c fire resistant roofing material.

Class a roofing materials are the most fire resistant. An exterior fire retardant treated shake roof has a stand alone class b rating. Shingles are categorized into classes that identify their fire resistance. 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.

Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. 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.