Ul 790 Class A Roof Assembly

This test standard and closely related standards such as underwriters laboratories ul 790 and uniform building.

Ul 790 class a roof assembly. 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. 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. 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.

Each requires a spread of flame test and a burning brand test. 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. Critical role in achieving class a b or c fire classification of roof assemblies. For roof assemblies with combustible decks wood plank t g astm e 108 and ul 790 require two additional fire tests.

Class a roof assemblies are those that are effective against severe fire test exposure. Ice and water shield. Class a roof coverings only are required for buildings located with. 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.

These are the spread of flame test intermittent flame test and burning brand test. Using two similar test methods. Spread of flame ul 790 burning brand testing ul 790 impact test ul 2218. All class 1 roof assemblies are class a roofs but not.

1 an intermittent flame test in which the flame is turned on and off during the roof assembly to resist fire from flaming embers. Class a roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency. Ul standard ul 790 edition 8 standard for standard test methods for fire tests of roof coverings edition date. April 22 2004 ansi approved.

Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. Ul assembly class. 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. 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 790 class a assemblies home resources ul 790 class a assemblies.