Terry shares with us that air sealing is often overlooked in floors and attic, and if there are air leaks with insulation, the insulation value just plummets. On his mini advanced framing model, he...
Terry shares with us that air sealing is often overlooked in floors and attic, and if there are air leaks with insulation, the insulation value just plummets. On his mini advanced framing model, he shows an example of spraying foam around piping that is protruding through the wooden frame, the ceiling plate and wall cavities. Having holes in the wall cavities allows free air movement between them, and in energy audits, one often finds air leakage in these areas. With hundreds of thousands of holes like these, the home is prone to lose heat and energy. In the crawl space, the same principle applies; if a hole is drilled through the flooring for plumbing, spray foam should be applied in the space between the piping and circumference of the hole drilled.
If there is air leakage between the sill plate and foundation, chemicals used to treat plants or shrubbery near ground level outside may potentially be blown and spread around the house. If one notices carpet stains on the inside of walls, this means that the carpet has been acting as a filter for air entering the house. Foam or caulking can be used to fill in these spaces. Terry shows off the spray foam gun he uses to fill in the gaps, and he likes his gun because the foam canister can be refilled whereas the canisters are tossed after use with the more traditional guns.
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