Fire Rating Roofing Shingles

Wood shake plywood or particle board roof are the most common roofing types listed as class c.

Fire rating roofing shingles.

Experience maximum flame spread of 13 feet. Classes b and c denote progressively less fire resistant qualities. An exterior fire retardant treated shake roof has a stand alone class b rating. But by including a particular underlying material it can meet the requirements for a class a roof.

Ul 790 is a quality assurance service listing. Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Roofing with a class c rating is able to. 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. Generally most fiberglass shingles have class a fire ratings and most organic shingles such as treated wood shingles have class c ratings. Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles. 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. Obviously since wildfires and the fire season has become increasingly worse it is important to note the roofing materials that are the lowest rated.