Fire Rated Roofing Systems

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Fire rated roofing systems.

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. 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. Roofing systems must meet or exceed building codes and insurance requirements. How are roofs rated.

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. A class a roof is ideal for fire protection and may be required by your building codes depending on your place of residence. These tests may be conducted at ul inc fm global or any other certified testing laboratory. Since 1980 firestone roofing systems have been installed on hundreds of thousands of roofs worldwide.

External fire exposure class a b or c. 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. Firestone building products is a leading manufacturer of high performing roofing systems for commercial industrial and residential roofing applications. The highest rating meaning the most fire resistant is classified as class a and is able to withstand severe fire exposure.

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. Reflective or retentive tpo is generally white and highly reflective. Your roof can have one of four fire ratings classifications. The rating scale is relatively simple and is rated from a to c.

These assemblies need to meet fire and smoke safety and environmental sustainability requirements. Our roof systems are rated by code for external fire resistance under deck exposure and time temperature resistance. Astm e108 defines fire test methods for roof coverings. Building code fire resistance requirements building codes establish fire resistance requirements for roofs based on the type of construction e g concrete steel wood for the building.

Class a is the highest rating offering the highest resistance to fire and unrated is the worst. Iko fire rated roofing systems include those designed to handle extreme temperatures and to mitigate fire. Class a class b class c or unrated.