Ul 790 Roof Assembly

The listed assemblies in this document may not contain all components of the approved assembly.

Ul 790 roof assembly. 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. Roof systems are segregated into combustible and non combustible construction types. 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. Spread of flame ul 790 burning brand testing ul 790 impact test ul 2218.

Contrary to what many think there are no class a roofing membranes. April 22 2004 ansi approved. 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 operative word here is systems.

Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. October 31 2002 ansi approved. Under ul 790 roof systems are evaluated for external fire. Each requires a spread of flame test and a burning brand test.

Ul standard ul 1256 edition 4 standard for fire test of roof deck constructions edition date. Ul standard ul 790 edition 8 standard for standard test methods for fire tests of roof coverings edition date. The preeminence of ul is most likely due to their ansi ul 790 protocol. Ice and water shield.

Ul 790 class a assemblies home resources ul 790 class a assemblies. Class a roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency. Ultraply tpo roof systems tested assembly guide august 2020 it is the responsibility of the user of this document to verify the included assemblies in the charts below with the associated firm s ul fm etc. Roof assemblies resistances to exterior fire exposure are typically tested and classified using two similar test methods.

Ibc section 1505 requires that roof assemblies meet the ul 790 class a b or c fire performance based on the type of construction of the building on which they are utilized. 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 b and c designations. Class a roof assemblies are those that are effective against severe fire test exposure. It also serves as a key differentiator for products within the roofing market.