Fire Rating Roofing 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.

Fire rating roofing shingles.

Class a fire resistance rating. Class a fire rating shingles with the highest fire resistance are classified as class a. 110 130 mph wind warranty. Class b fire rating shingles that offer moderate fire resistance are classified as class b.

Shingles feature an algae defender. Features a diamond open tooth design. Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. The ul tests under ul 790 evaluate the behavior of a roof covering under three fire hazards exposure of the roof to intermittent flame.

Ul 790 is a quality assurance service listing. Only available in four colors. Experience maximum flame spread of 13 feet. Classes b and c denote progressively less fire resistant qualities.

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. Roofing with a class c rating is able to. 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. Shingles are categorized into classes that identify their fire resistance. 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.

These shingles are also not readily flammable will not readily contribute to the spread of fire and are relatively effective against moderate fire exposure. Class c roofing provides only light fire protection. These shingles will be effective against moderate fire exposures are not readily flammable and will not cause fires to spread.