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Question DetailsAsked on 10/24/2013

what does a foam roof cost?

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2 Answers


Perhaps you could use Answer This Question to provide us with some more details of exactly what type of roof you have, so we can give as good an answer as possible. Also, are you talking total tearoff, repair, or overlay (if feasible) over an existing roof (and slope and type of existing roof) .

There are a number of types of roof using foam -

1) foam board under built-up or hot-mop tar roofs ("single-faced sandwich roof"),

2) pavers over foam board over membrane (IRMA or ballasted insulation roof),

3) foam board with sprayed asphaltic or bitumastic sealant over it (a "brownie" roof),

4) foam board sandwiching a membrane ("orio roof"),

5) and polyurethane foamed-in-place roofing with a sprayed UV sealant or paint over it ("whipped cream roof").

Dramatic difference in pricing between the various types, and also in whether they can be overlaid with a repair layer or have to be torn up to repair/replace them.

Answered 6 years ago by LCD


After investigating I found it to cost about 4.50 per square foot. If you are considering replacing a flat roof you might want to consider replacing it with a membrane roof. Foam roofs do not last as long, and are prone to areas that bubble up and create weak areas. We own a townhouse, where the roof only lasted 7-8 years before the HOA had to reroof. A membrane roof, which I installed on my adobe roof country home, is made of a durable sun-reflective commercial grade material that is rolled on, secured and heat seamed electrically, with each vent pipe, and penetration wrapped and heat sealed with the same material and heavily caulked and oversealed. Essentially you end up with a one piece roof, that goes over existing roofing, which adds to the insulating properties of the roof and is highly reflective, reducing cooling costs in the summer. For the extra 75 cents to a dollar per square foot, you will get a roof with about a 20 year materials guarantee, and a 5-20 year workmanship guarantee, depending on the contractor. The roofing material is as think or slightly thicker than a shingle. If you go with a membrane roof, ask for commercial grade materials.

Source: Recent Personal Experience.

Answered 6 years ago by Guest_96455872

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