Fire Rating Roofing Shingles

Class c roofing provides only light fire protection.

Fire rating roofing shingles.

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. 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.

Shingles are categorized into classes that identify their fire resistance. 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. 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.

An exterior fire retardant treated shake roof has a stand alone class b rating. Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles. 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. Wood shake plywood or particle board roof are the most common roofing types listed as class c.

Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. Class c fire resistant roofing material.