Fire Rated Roofing Materials

Understanding roof fire ratings class a roofing.

Fire rated roofing materials.

And you shouldn t overlook the roof as essential in fire protection since it s extremely vulnerable to sparks blown from wildland fire. 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. Combustible and noncombustible refer to the performance of a material e g wood stucco steel. An example of a roof assembly is given in figure 1.

Underlying material may also be used to boost the roof material rating but these rating will. Before choosing a material you should know the fire ratings that are given to each material. Fire resistant roofing materials fire ratings. Their knowledge and experience can get you the best option for your needs and budget.

Class a roofing is the preferred choice for any home but this type of roofing is particularly important if you live in an area that is prone to wildfires to achieve a class a rating the roof must be effective against severe fire exposure. Stucco is a plaster that has been used for centuries for both artistic and structural purposes. 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.

A professional roofing contractor can help you decide upon the best fire resistant material for your roof. Using quality fire resistant roofing materials gives the entire structure a better chance of surviving a fire. Your roof might also come into contact with open flame if a fire moves into your area. Some roofing materials such as untreated wood are unrated as they cannot meet even the minimum ratings for fire safety.

Concrete is often listed as among the best fire resistant roofing materials too. The resistance to fire of roofing materials is rated based on a series of tests that is defined by a fire rating. Roofing fire ratings 101. Class c fire resistant roofing material.

Ul 790 is a quality assurance service listing. Fire resistant can refer to a material or an assembly e g all the component s in a wall siding insulation and sheathing products. Obviously since wildfires and the fire season has become increasingly worse it is important to note the roofing materials that are the lowest rated. A reliable roofer will be able to find the right option to match your style and budget.

Roofing materials go through strenuous testing to determine a fire rating. However if the wood is treated with fire retardant chemicals it can often meet class b or even class a requirements. Here are a few materials on the market that are effective in withstanding fire.