Spray Foam Insulation
$2.50 per sq ft
Estimated value as of 2026 · National average from 2026 pricing guides across multiple sources like Sprayman.co and Angi[1][2]
Spray foam insulation is a building material used to insulate walls, attics, and crawl spaces by expanding to fill gaps upon spraying.
Fun fact Closed-cell spray foam costs roughly twice as much as open-cell but provides higher R-value per inch and acts as a moisture barrier[1][3].
spray-foaminsulationbuilding-materialshome-improvementconstruction
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