Ul Class A Roofing System

Class a roof assemblies are those that are effective against severe fire test exposure.

Ul class a roofing system.

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. Class a designates resistance to relatively severe fire test exposure. There are three levels of fire resistance.

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. Certification database ul product iq access ul certification data on products components and systems identify alternatives and view ul guide information with product iq. To achieve a class a rating the roof must be effective against severe fire exposure. This system is classified for all types of roof deck construction for fire resistive construction methods.

Class a roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency. Class a roofing is the preferred choice for any home but this type of roofing is particularly important if you live in an area that is prone to wildfires. Class a is the highest level. Ul 790 and astm e 108.

Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. The details for the manufacturers system typically include the following information. Class a b or c the deck construction supporting the roofing system combustible or noncombustible any restrictions on the roof incline required or optional if so indicated barrier boards ply sheets and surfacing. Any ul class a b or c roofing system tgfu or prepared roof covering tfwz layer 2 roof sheathing.

Class b designates resistance to relatively moderate fire test. 15 32 thick wood structural panels min. Fire resistance is based on two test standards. Ul class a industrial roof system.

This is proven if it can. The ul 790 classification e g. It is not limited to thickness or incline restrictions like most foam roofing systems. Experience maximum flame spread of 6 feet.

It also serves as a key differentiator for products within the roofing market.