Spray Foam On Top Of Metal Roof

Spray foam has 100 chemical adhesion to metal so it can definitely be applied to metal roofs.

Spray foam on top of metal roof.

I am interested in adding insulation to the roof. Both applications are a great fit for spray foam thanks to its unmatched versatility. Are the rafter mates problematic. If so would their effect be negated if i filled the gap with spray foam from above the deck down into the void.

That s a good thing. All that needs to be done is ensuring that the roof is properly cleaned and dried and the foam can easily be applied to the surface. The flat roof of this 1957 eichler designed house was a good candidate for a polyurethane spray foam roof. At year 10 20 a contractor will add more coating and granules.

Production and installation overview. Since a spray foam system consists of spray foam coating and granules after 10 20 years some of the coating and granules will naturally wear away. In fact spray foam has a 100 chemical adhesion across the entire metal roof. Spray polyurethane foam spf insulation on metal roof and wall panels posted on august 12 2016 by jason allen 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.

The foam never gets touched and never loses r value. The shoup household has many shades of green. Eps overtop the existing shingles 2x4 s for air channels 1x3 strapping across the channels for a vented cold metal roof overtop the added foam. If it s a tiny crack or hole yes it will keep the roof sealed and avoids requiring repair.

The spray can be basically applied on top or bottom of the metal roofing surfaces. Some people are concerned that spray foam disguises a roof leak. Spraying foam on the underside of your roof is a great way to stop air from flowing out of the top of your house. If you have a roof leak with your metal roof installing spray foam over top can close all those leaks and provide you with more r value.

In retrofit or re roof applications the foam can be applied directly to the existing roof in many cases. Compared to the fiberglass batts this insulation is much better. A spray foam roof can be the last roofing system you ll ever need on a building. I would like to avoid installing sheathing if possible extra waste but i don t want to compromise the r value of the spray foam or to have the foam ooze out between the metal panels as it expands.

In new construction some sort of roof deck often metal must first be installed before the foam can be applied. It is a great way to block any holes and leaks in a metal roof and make it airtight once again. Spray polyurethane foam will mirror what the existing metal roof is. Taya is a landscape architect and stephen is the principal of buildinglab a green design build firm in emeryville ca whose reincarnated shipping containers were chronicled in the gba posting creating an urban oasis.