Fire Rated Roofing Materials

Astm e108 defines fire test methods for roof.

Fire rated roofing materials.

Understanding roof fire ratings class a roofing. Expect to pay between 6 50 and 8 50 per square foot installed. Designed to handle extreme temperatures these reinforced fire rated cap sheets provide an extra line of defense and protection for building inhabitants. Fire ratings for roof coverings that require an additional material are typically referred to as a by assembly as opposed to a stand alone fire rating.

However if the structure of the roof is made of wood a slate roof may collapse in the event of a fire because of the heavy weight of. Class c fire resistant roofing material. This month let s take a closer look at one particular type fire ratings. 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.

Roofing systems must meet or exceed building codes and insurance requirements. Wood shake plywood or particle board roof are the most common roofing types listed as class c. This fire resistance rating indicates that the rated roofing materials will withstand moderate exposure to fire if the fire source is outside the building. Class a does not mean grade a roofing systems are rated by realistic fire tests.

Obviously since wildfires and the fire season has become increasingly worse it is important to note the roofing materials that are the lowest rated. In a recent roofing column we focused upon technical information that could be found on roofing material wrappers that could verify compliance with various building codes. Fire ratings may pertain to resistance to fire from above the roof system the familiar class a b or c ratings or fire exposure from the building interior the underside of the roof deck. Fire resistance rated construction the use of materials and systems in the design and construction of a building or structure to safeguard against the spread of fie within a building or structure and the spread of fire to or from buildings or structures to the wildland urban interface area.

It doesn t require any special treatment because fire will not affect it. Here are some of the best class a fire rated roofing materials. Prevent fire rated roofing system schools and hospitals can benefit from iko s prevent premium asphalt based roofing systems. This rating indicates that the roofing materials limited to withstanding only light exposure to fire if the fire source is outside the building.

Manufactured using a highly effective fire retardant and underlaid with a fire resistant barrier this assembly is one of only a few synthetic roofing materials to get ul s class a fire rating. How are roofs rated.