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blown in

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Insulation crew blowing loose-fill material into an attic around a depth marker

Blown-In Insulation Cost per Sq Ft (2026): Cellulose vs Fiberglass by R-Value

Blown-in insulation costs $1.50 to $3.50 per sq ft installed in 2026 ($0.90 to $1.80 DIY). Cellulose vs fiberglass by R-value, attic vs walls, bags needed.

Erin KesslerApr 5, 2026Updated Aug 11, 202612 min read