Ul Class A Roofing System

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.

Ul class a roofing system.

Class a designates resistance to relatively severe fire test exposure. 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. There are three levels of fire resistance. Experience maximum flame spread of 6 feet.

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 a roof assemblies shall be permitted for use in buildings or structures of all types of construction. Due to the materials used in their construction most asphalt shingle roof assemblies have a class a fire resistance rating. 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.

Ul class a industrial roof system. The details for the manufacturers system typically include the following information. This is proven if it can. 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.

To achieve a class a rating the roof must be effective against severe fire exposure. 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. It also serves as a key differentiator for products within the roofing market. Class a is the highest level.

It is not limited to thickness or incline restrictions like most foam roofing systems. 15 32 thick wood structural panels min. Class a roof assemblies are those that are effective against severe fire test exposure. Grade c d or sheathing.

Certification database ul product iq access ul certification data on products components and systems identify alternatives and view ul guide information with product iq. This system is classified for all types of roof deck construction for fire resistive construction methods. Class b designates resistance to relatively moderate fire test. Ul 790 and astm e 108.

The ul 790 classification e g.