Fire Rating Roofing Shingles

These shingles are also not readily flammable will not readily contribute to the spread of fire and are relatively effective against moderate fire exposure. 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. Generally most fiberglass shingles have class a fire ratings and most organic shingles such as treated wood shingles have class c ratings.

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Classes b and c denote progressively less fire resistant qualities.

Fire rating roofing shingles.

Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. Ul 790 is a quality assurance service listing. 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. These shingles will be effective against moderate fire exposures are not readily flammable and will not cause fires to spread.

Class a fire resistance rating. Class a fire rating shingles with the highest fire resistance are classified as class a. A standard fire test is used to determine the fire rating of a roof covering. Unique diamond shape is a good choice for homes with a steep roof.

Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Most customer reviews of pabco roofing shingles are positive. Shingles are categorized into classes that identify their fire resistance. Features a diamond open tooth design.

Class c roofing provides only light fire protection. Class a roofing materials are the most fire resistant. Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles. Experience maximum flame spread of 13 feet.

Shingles feature an algae defender. Class b fire rating shingles that offer moderate fire resistance are classified as class b. 110 130 mph wind warranty. Roofing with a class c rating is able to.

The main difference. The ul tests under ul 790 evaluate the behavior of a roof covering under three fire hazards exposure of the roof to intermittent flame. Only available in four colors.

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