Fire Rated Roofing Materials

Shingles are categorized into classes that identify their fire resistance.

Fire rated roofing materials.

It s lightweight won t corrode and requires little maintenance. Roofing with a class c rating is able to. Metal roofing is non combustible and offers class a protection in combination with a fire resistant underlayment. Class c roofing provides only light fire protection.

Most metal roofs are made of steel copper zinc and alloys that are best for the dry environment in nevada. Class b materials are banned in some areas however because they are combustible. The fiberglass based variety also offers excellent fire resistance when installed with fire code compliant underlayments. Experience maximum flame spread of 13 feet.

When tested to see how fast a fire spreads with these materials class a materials stop the spread two feet better than class b. These materials include clay concrete shingles metal roofing and fiberglass asphalt composition. Roof eaves overhangs are a fire hazard but they can be protected with an encasement of fire resistant material. Class c fire resistant roofing material obviously since wildfires and the fire season has become increasingly worse it is important to note the roofing materials that are the lowest rated.

Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. An exterior fire retardant treated shake roof has a stand alone class b rating. Wood shake plywood or particle board roof are the most common roofing types listed as class c. But by including a particular underlying material it can meet the requirements for a class a roof.

Stop fire and stay stylish. Class a roofing materials are the most fire resistant. Stucco is often recommended as one of the best materials for boxing in hazardous eaves. Metal tiles are made of a material that does not ignite when on fire with a fire resistant barrier with a class a protection.

Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Fiberglass based asphalt shingles as the most economical of all residential roofing materials asphalt shingles make up 80 percent of the u s. 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 called densdeck.

Non treated materials have a class c fire rating but wood can cedar shingles and shakes are also available as a more costly treated option wood roofing is prohibited in some areas prone to wildfire so be sure to check with your building department first. Metal roofing can be made from copper zinc and steel as well as various alloys and comes in a variety of finishes colors and designs. Generally most fiberglass shingles have class a fire ratings and most organic shingles such as treated wood shingles have class c ratings.