Ul Class A Roofing System

Experience maximum flame spread of 6 feet.

Ul class a roofing system.

Class a designates resistance to relatively severe fire test exposure. It is not limited to thickness or incline restrictions like most foam roofing systems. Ul class a industrial roof system. 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.

15 32 thick wood structural panels min. This is proven if it can. A roof is classified as a class a as the result of one test the external spread of flame test astme 108 or ul 790 standard. For fire tests of roof coverings and ul 790 standard test methods for fire tests of roof coverings the tests provide the basis for the class a b and c designations.

Any ul class a b or c roofing system tgfu or prepared roof covering tfwz layer 2 roof sheathing. Class a is the highest level. The ul certification mark on roofing products and assemblies is relied on by code enforcement officials and buyers to verify that your products and systems meet regulatory requirements. Ul 790 and astm e 108.

It also serves as a key differentiator for products within the roofing market. Class a roof assemblies are those that are effective against severe fire test exposure. Due to the materials used in their construction most asphalt shingle roof assemblies have a class a fire resistance rating. This system is classified for all types of roof deck construction for fire resistive construction methods.

A class 1 roof has undergone a series of tests that evaluate the entire roof assembly including the external spread of flame test utilized for the class a rating. Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. Class a b or c the deck construction supporting the roofing system combustible or noncombustible any restrictions on the roof incline required or optional if so indicated barrier boards ply sheets and surfacing. Class b designates resistance to relatively moderate fire test.

Class a roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency. Grade c d or sheathing. Fire resistance is based on two test standards. To achieve a class a rating the roof must be effective against severe fire exposure.

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