Copper or thicker can be installed over combustible decks and be considered class a without testing.
Ul 790 roof assembly.
It also serves as a key differentiator for products within the roofing market.
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.
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.
Class a roof assemblies include those with coverings of brick masonry and exposed concrete roof deck.
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.
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.
Ice and water shield.
Building with fire safety in mind.
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.
If metal panels are installed over combustible decks the assembly needs to be tested using astm e108 or ul 790.
Spread of flame ul 790 burning brand testing ul 790 impact test ul 2218.
Coated steel or aluminum roofing panels.
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.
Ul certification customer information.
Roof assemblies resistances to exterior fire exposure are typically tested and classified using two similar test methods.
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.
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.
Class a b and c roofing required by this section to be listed shall be tested in accordance with ul 790 or astm e108.
Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction.
