These kits typically yield 200 board feets’ worth of spray foam, making them a good candidate for medium-sized projects, like sealing roof and wall junctions, attic walls and basement sill plates.

Basement insulation is essential for energy efficiency, comfort, and cost savings. ... Spray foam insulation expands to fill gaps, offering a tight, moisture-resistant seal.

Installing spray foam to an uninsulated attic is generally the cheapest while applying it to basement walls tends to be the ...

Rigid foam insulation works best if the foundation walls are smooth. If the basement is an old stone foundation, insulation companies can spray expanding foam directly on the rough masonry.

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