Fire Rating Roofing Shingles

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

Fire rating roofing shingles.

Class a fire rating shingles with the highest fire resistance are classified as class a. The main difference. Unique diamond shape is a good choice for homes with a steep roof. Classes b and c denote progressively less fire resistant qualities.

Roofing with a class c rating is able to. Experience maximum flame spread of 13 feet. 110 130 mph wind warranty. Class c roofing provides only light fire protection.

Features a diamond open tooth design. Generally most fiberglass shingles have class a fire ratings and most organic shingles such as treated wood shingles have class c ratings. Only available in four colors. The ul tests under ul 790 evaluate the behavior of a roof covering under three fire hazards exposure of the roof to intermittent flame.

Class a fire resistance rating. These shingles will be effective against moderate fire exposures are not readily flammable and will not cause fires to spread. Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Class b fire rating shingles that offer moderate fire resistance are classified as class b.

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. 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. Ul 790 is a quality assurance service listing. Shingles are categorized into classes that identify their fire resistance.

Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles. A standard fire test is used to determine the fire rating of a roof covering. These shingles are also not readily flammable will not readily contribute to the spread of fire and are relatively effective against moderate fire exposure.