Double Insulated. Owens Corning’s EnergyComplete System has two components: a latex-based spray foam and blown-in fiberglass insulation. The minimally expanding foam, which goes on seams and gaps in the framing to protect against air infiltration, is less toxic than typical expanding foam systems, says the maker. The system costs about $1 per finished square foot of house more than the company’s standard insulation package. Owens Corning, 800/438-7465.

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