Fire Rated Roofing Systems

Class a class b class c or unrated.

Fire rated roofing systems.

Since 1980 firestone roofing systems have been installed on hundreds of thousands of roofs worldwide. How are roofs rated. The highest rating meaning the most fire resistant is classified as class a and is able to withstand severe fire exposure. External fire exposure class a b or c.

Our roof systems are rated by code for external fire resistance under deck exposure and time temperature resistance. These assemblies need to meet fire and smoke safety and environmental sustainability requirements. Your roof can have one of four fire ratings classifications. One goal of this column will be to increase your understanding of each of these ratings and what the rating does and does not do for your peace of mind.

These tests may be conducted at ul inc fm global or any other certified testing laboratory. Reflective or retentive tpo is generally white and highly reflective. Fire ratings for roofs are classified as either class a class b class c or are unrated if a roof covering cannot meet the requirements for any of these classifications. Astm e108 defines fire test methods for roof coverings.

Fire rated wall floor and ceiling assemblies provide the necessary fire and smoke barriers to create compartmentalization during a fire safeguarding against the spread of fire and smoke within a building or to and from a building. Class a is the highest rating offering the highest resistance to fire and unrated is the worst. 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. A class a roof is ideal for fire protection and may be required by your building codes depending on your place of residence.

Class a fire rated tpo membranes and epdm can achieve underwriters laboratories ul class a fire resistance listings by adding fire retardant chemicals during the manufacturing process. Iko fire rated roofing systems include those designed to handle extreme temperatures and to mitigate fire. Roofing systems must meet or exceed building codes and insurance requirements. Tested roof systems are fire classified class a b or c where the most fire resistant roof assemblies are class a and class c is least resistant.

The prevent line of polyester reinforced or composite fire rated cap sheets provide an extra protective coating and line of defense to iko s premium asphalt based roofing systems. To learn more about our roofing systems click on one of the product boxes below. The rating scale is relatively simple and is rated from a to c.