Spray Foam On Top Of Metal Roof

Your metal roof expands when it s hot and contracts when it s cold.

Spray foam on top of metal roof. An spf roof can also be quite durable when the polyurethane is sprayed with a special acrylic top coating that protects the foam against uv degradation. This posting was excerpted from renovation 4th edition newly published by taunton press. Let s start with the foam side of the equation first. In retrofit or re roof applications the foam can be applied directly to the existing roof in many cases.

An open cell foam about 0 5 pound density is the most. Lastly the foam s light color will reflect sunlight so all in all it should be a relative cool roof. In new construction some sort of roof deck often metal must first be installed before the foam can be applied. Spray foam is a great fit for both new construction and retrofit applications.

Spray foam insulation steel roofing and corrosion hansen pole buildings designer rachel recently had an interesting discussion with a client. The spray can be basically applied on top or bottom of the metal roofing surfaces. Spf roofs are installed by spraying a liquid on the existing roof and allowing it to expand into a foam. Spf insulation improves a building s energy efficiency and provides thermal air and vapor barrier capabilities.

With building code compliance and sustainable building envelopes at the forefront in today s marketplace spray polyurethane foam insulation spf applied to single skin metal roof and wall panels is an alternative to insulated metal panels with a manufacture applied polyurethane foam core. Most of the time extreme heat shifts cause that leak. The gist of the discussion was the client had heard spray foam insulation will corrode the steel and void the warranty of the steel. This process means that the foam can conform to all roof shapes and types even irregularly shaped roofs.

Can i apply spray foam insulation directly to the underside of a metal roof. For metal roofing it is fairly common to use architectural grade roofing without. Polyurethane spray foam metal roof insulation. After cleaning the existing roof the spf roof can be applied directly over asphalt shingles concrete metal and wood.

We show you the spray foam installation process over a metal panel roof from start to finish. A spray polyurethane roof can be installed over a leaking metal roof. The purpose of the requirement that rigid foam installed above roof sheathing meet certain minimum r values is to ensure that the roof sheathing stays warm enough during the winter to avoid moisture accumulation and possible sheathing rot.