Is Tpo Roof Covering Class Of Fire Rating

The slope of the test specimen is preselected and since steeper slopes are more of a challenge due to melting material feeding the fire the rating applies to the maximum slope passed.

Is tpo roof covering class of fire rating.

Tpo is touted to have the benefits of two of its direct competitors epdm and pvc roofs but without the drawbacks and extra costs. Class a is the highest rating offering the highest resistance to fire and unrated is the worst. We must emphasize however that individual roof components are not rated at all. Customer choice of insulation since single ply membrane roofing does not include the insulation factor as a customer you have more options to choose from to insulate your facility s roof.

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. Please contact the firestone codes approvals department when looking for a specific classification or rating. The maximum flame spread is 6 feet for a class a rated roof 8 feet for class b and 13 feet for class c. Assembly rated class a roof coverings are those that meet class a standards when combined with other elements.

Fire ratings for roofs are classified as either class a class b class c or are unrated if a roof covering cannot meet the requirements for any of these classifications. Class a does not mean grade a roofing systems are rated by realistic fire tests. Class a fire rated tpo membranes and epdm can achieve underwriters laboratories ul class a fire resistance listings by adding fire retardant chemicals during the manufacturing process. If you are looking to install a single ply roofing membrane that will be energy efficient and are evaluating your options consider tpo thermoplastic olefin roofing.

Our roof systems are rated by code for external fire resistance under deck exposure and time temperature resistance.