Spread of flame ul 790 burning brand testing ul 790 impact test ul 2218.
Ul 790 roof assembly.
Class a b and c roofing required by this section to be listed shall be tested in accordance with ul 790 or astm e108.
Ice and water shield.
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.
Ul 790 evaluates the ability of the roof assembly to resist a simulated fire source originating from outside the building on which the roof coverings are installed.
Copper or thicker can be installed over combustible decks and be considered class a without testing.
Building with fire safety in mind.
These ratings are based on the ability to prevent a fire from penetrating through the roof and the ability to minimize the spread of a fire along the roof surface.
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.
This test standard and closely related standards such as underwriters laboratories ul 790 and uniform building code 15 2 is used to determine the ability of a roof system to hinder the horizontal spread or vertical penetration of an external fire source.
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.
If metal panels are installed over combustible decks the assembly needs to be tested using astm e108 or ul 790.
An exception for combustible decks is that 16 oz sq.
Roof assemblies resistances to exterior fire exposure are typically tested and classified using two similar test methods.
Coated steel or aluminum roofing panels.
Ul 790 class a assemblies home resources ul 790 class a assemblies.
Ul certification customer information.
Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction.
Class a roof assemblies include those with coverings of brick masonry and exposed concrete roof deck.
Ul certification customers have free access to ul standards not including ul iec based standards.
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.
