Ul 790 Class A Roof Assembly

Ul standard ul 790 edition 8 standard for standard test methods for fire tests of roof coverings edition date.

Ul 790 class a roof assembly.

These are the spread of flame test intermittent flame test and burning brand test. This test standard and closely related standards such as underwriters laboratories ul 790 and uniform building. Class a roof coverings only are required for buildings located with. For roof assemblies with combustible decks wood plank t g astm e 108 and ul 790 require two additional fire tests.

Roof assemblies resistances to exterior fire. The class of roof covering required by each regional building code depends upon many factors including the use and. All class 1 roof assemblies are class a roofs but not. Coated steel or aluminum roofing panels.

April 22 2004 ansi approved. Ice and water shield. Using two similar test methods. Class a roof assemblies are those that are effective against severe fire test exposure.

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. Spread of flame ul 790 burning brand testing ul 790 impact test ul 2218. Critical role in achieving class a b or c fire classification of roof assemblies. 1 an intermittent flame test in which the flame is turned on and off during the roof assembly to resist fire from flaming embers.

Astm e108 standard test methods 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 roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency. Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. 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.

Each requires a spread of flame test and a burning brand test. 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. The 2012 and 2015 ibc in section 1505 of chapter 15 states that fire classification of roof assemblies is based on two tests astm e108 and ul 790 that are fundamentally identical. 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.

Any ul classified type g1 g2 or g3 base ply sheet type 15 20 or 30 felt or ul classified prepared roofing accessory or gcp applied technologies inc.