Natural Gas And Foam Roof Insulation

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Natural gas and foam roof insulation.

Sealed combustion appliances fueled with natural gas cost less to operate than electric ones. Especially for roofs and attics. Most often the attic is sealed by installing spray foam insulation at the roofline thus bringing the attic inside the building enclosure and turning it into conditioned space directly or indirectly. There are several new types of spray in place foam insulation.

The good news is that some installers understand this problem and seek to address. Roof replacement is extremely expensive and difficult to justify for energy savings only. There are urethane foam products designed to spray directly on top of existing flat roof surfaces and then have a gravel ballast or membrane seal applied over the foam. Not long ago someone even told me that in florida roofing companies won t let their workers go up on roofs with open cell spray foam because the roofs are so spongy the guys fall right through.

Spray polyurethane foam spf is a popular insulation product for homes and buildings. A while back i wrote about the incompatibility of putting an atmospheric combustion furnace in a sealed attic. It rots roofs people have told me. Flat roofs are only practical to re insulate when replacing the roof.

Murmurs and hearsay about open cell spray foam insulation have been gaining traction for a while. Air tight homes require sealed combustion hvac appliances and mechanical ventilation. It should not be confused with the old uf foam insulation. One a new type of spray in foam is calledicynene foam.