Ul 790 Class A Roof Assembly

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.

Ul 790 class a roof assembly.

For roof assemblies with combustible decks wood plank t g astm e 108 and ul 790 require two additional fire tests. Ul assembly class. April 22 2004 ansi approved. Ul standard ul 790 edition 8 standard for standard test methods for fire tests of roof coverings edition date.

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. Class a roof assemblies are those that are effective against severe fire test exposure. Class a roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency. 1 an intermittent flame test in which the flame is turned on and off during the roof assembly to resist fire from flaming embers.

It also serves as a key differentiator for products within the roofing market. Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. 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. 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. Ice and water shield. Critical role in achieving class a b or c fire classification of roof assemblies.

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. Using two similar test methods. This test standard and closely related standards such as underwriters laboratories ul 790 and uniform building. These are the spread of flame test intermittent flame test and burning brand test.

Roof assemblies resistances to exterior fire. 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. 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. Ul 790 class a assemblies home resources ul 790 class a assemblies.

Each requires a spread of flame test and a burning brand test.