Spray Foam On Top Of Metal Roof

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.

Spray foam on top of metal roof.

If it s a tiny crack or hole yes it will keep the roof sealed and avoids requiring repair. 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. 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. The spray can be basically applied on top or bottom of the metal roofing surfaces.

Financially speaking this spray is a great option especially when you need to renovate your roof after the application. 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. A spray foam roof can be the last roofing system you ll ever need on a building. Both applications are a great fit for spray foam thanks to its unmatched versatility.

That s a good thing. The foam never gets touched and never loses r value. The shoup household has many shades of green. 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.

Some people are concerned that spray foam disguises a roof leak. The 3 foot roof panels will be anchored to purlins that run diagonal to the rafters. In new construction some sort of roof deck often metal must first be installed before the foam can be applied. Don t use spray foam to fix a roof leak.

In retrofit or re roof applications the foam can be applied directly to the existing roof in many cases. I am interested in adding insulation to the roof. If so would their effect be negated if i filled the gap with spray foam from above the deck down into the void. Are the rafter mates problematic.

In fact spray foam has a 100 chemical adhesion across the entire metal roof. 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. The flat roof of this 1957 eichler designed house was a good candidate for a polyurethane spray foam roof. Compared to the fiberglass batts this insulation is much better.

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. It is a great way to block any holes and leaks in a metal roof and make it airtight once again. Production and installation overview. Spraying foam on the underside of your roof is a great way to stop air from flowing out of the top of your house.