ALUMINUM ROOF FIRE RATING

Jean Tarlton
11/2/2017
Following Hurricane Irma and damage to our shingle roof, we intend to replace it with a metal roof. We are considering standing seam .040 aluminum, as we live on a canal ... two blocks from ocean front. I read in one discussion that "Aluminum does not have a Class A fire-rating but the system can achieve a Class A rating with the proper underlayment and sheathing." We did see one YouTube video of a Miami residence re-roofing application where they installed a fire retardant layer, 30# felt layer, underlayment layer, then the standing seam Aluminum roof panels. What does the Florida Building Code require? Will an Aluminum Roof cause my Homeowners Insurance to increase??Also, are we sacrificing metal strength by using Aluminum instead of Galvalume? This website is a great consumer resource. Thank you!
Todd Miller
Isaiah Industries, Inc.
11/2/2017
Thanks so much for considering a metal roof. With being so close to the ocean, I really strongly encourage aluminum rather than steel. .040" aluminum will create a very strong roof. As far as fire requirements, in the keys and Miami, that will be per local code so you'd need to check locally. Certainly, Class A would be wise ... and you can achieve Class A (aluminum) either through assembly testing that has been on the metal roof you're installing or by using an underlayment product that has been tested for Class A beneath a variety of roofing materials. Thanks again.

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