But a preinstalled membrane may be even more effective at removing condensation.
Spray foam metal roof.
After cleaning the existing roof the spf roof can be applied directly over asphalt shingles concrete metal and wood.
The problem with using.
Traditionally we ve insulated the roof panel to try and keep the temperature on the panel from reaching the dew point.
Http www tigerfoam ca using tiger foam spray foam for a metal roof overhead application.
We ll add a vapor barrier so the moist air does not flow up through the insulation and condense on the 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.
Most unvented attics incorporate spray polyurethane foam spf on the underside of the roof deck and attic walls.
This process means that the foam can conform to all roof shapes and types even irregularly shaped roofs.
In retrofit or re roof applications the foam can be applied directly to the existing roof in many cases.
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.
This construction approach was first used in the 1970s and it has been implemented much more widely since it was first included in the international code council s icc model building code in 2007 irc section 806 4.