Fire Rating Roofing Shingles

Class a fire rating shingles with the highest fire resistance are classified as class a.

Fire rating roofing shingles. Only available in four colors. Generally most fiberglass shingles have class a fire ratings and most organic shingles such as treated wood shingles have class c ratings. If wood shakes and shingles are impregnated with fire retardant chemicals they meet the requirements for a class b fire rating and can meet a class a rating if additional materials are included in the roof assemblies. The main difference.

Class a roofing materials are the most fire resistant. Features a diamond open tooth design. Unique diamond shape is a good choice for homes with a steep roof. Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles.

Ul 790 is a quality assurance service listing. Class b fire rating shingles that offer moderate fire resistance are classified as class b. Most customer reviews of pabco roofing shingles are positive. These shingles are also not readily flammable will not readily contribute to the spread of fire and are relatively effective against moderate fire exposure.

Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. A standard fire test is used to determine the fire rating of a roof covering. 110 130 mph wind warranty. Classes b and c denote progressively less fire resistant qualities.

The ul tests under ul 790 evaluate the behavior of a roof covering under three fire hazards exposure of the roof to intermittent flame. Shingles are categorized into classes that identify their fire resistance. Experience maximum flame spread of 13 feet. 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.

Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Shingles feature an algae defender. Class a fire resistance rating.