Ul Class A B Or C Roofing System

When tested to ul 2218 shingles can achieve an impact resistance rating from class 1 through 4 with a class 4 rating being the highest and best.

Ul class a b or c roofing system. Class a designates resistance to relatively severe fire test exposure. To meet class a the test specimen must resist 15 cycles class b eight cycles and class c three cycles. 15 32 thick wood structural panels min. Grade c d or sheathing.

Class a b or c rating is a measurement of the external spread of flame on a roof surface. Class c roofing provides only light fire protection. The class a brand weighs 2 000 grams class b 500 grams and class c 9 1 4 grams. Critical role in achieving class a b or c fire classification of roof assemblies.

Find gaf s specifications for versashield here. Experience maximum flame spread of 13 feet. The intermittent flame test. Certification database ul product iq access ul certification data on products components and systems identify alternatives and view ul guide information with product iq.

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. Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. The standard test methods for fire tests of roof coverings ul 790 astm e 108 includes three key tests to provide fire classification of roof covering materials and systems. It is an entirely different test from astm e 84 ul 723 and it includes weathering per.

Roofing with a class c rating is able to. Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Class b designates resistance to relatively moderate fire test. Underwriters laboratory ul standard 2218 is a test method for evaluating impact resistance.

Get automatic lifetime protection on your entire gaf roofing system when you install any gaf lifetime shingle and at least 3 qualifying gaf accessories you ll automatically get a lifetime limited warranty on your shingles and all qualifying gaf accessories. Any ul class a b or c roofing system tgfu or prepared roof covering tfwz layer 2 roof sheathing. These are the spread of flame test intermittent flame test and burning brand test. A number of fire test laboratories including underwriters laboratories ul and fm global fmg conduct this test using either the astm e 108 or ul 790 standard.

The astm e 108 ul 790 roof coverings test does not produce a flame spread rating. A gas flame is cycled on and off.