Assembly rated class a roof coverings are those that meet class a standards when combined with other elements.
Ul class a roof assembly.
For example shake roofing with a fire retardant treatment rates class b on its own but achieves a class a rating when combined with specified underlying materials such as type 72 roll roofing material.
Order to gain a class 1 designation.
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.
While a class 1 assembly can be substituted for a class a b or c roof assembly a class a b or c assembly cannot be substituted for a class 1 roof assembly.
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.
Coated steel or aluminum roofing panels.
Truth about roofing underlayments 4 photovoltaic systems scan with your mobile qr code reader to find out more about ul support for code authorities.
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.
Under ul 790 roof systems are evaluated for external fire.
Certification database ul product iq.
For insulated steel roof deck assemblies fm class 1 includes fm 4470 and fm 4450 approval standard for class 1 insulated steel decks roofs.
Roof systems are segregated into combustible and non combustible construction types.
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.
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.
Roofing assembly classification will need to be for each roofing project.
All class 1 roof assemblies are class a roofs but not.
A secure online source for increased visibility into your ul project files product information documents samples and services.
The information needed to achieve code compliant installations is included below.
The operative word here is systems.
It should be noted that these classifications apply to roofing assemblies and not the roofing membrane.
It also serves as a key differentiator for products within the roofing market.
The preeminence of ul is most likely due to their ansi ul 790 protocol.
Contrary to what many think there are no class a roofing membranes.
Ice and water shield.
The ul evaluation report an additional differentiator provides code authorities.
