How much does attic insulation cost?

Blown-in attic insulation runs about $1.50–$2.50 per square foot installed. A 1,000 sq ft attic often costs $1,500–$2,500.

Is spray foam worth the cost?

Spray foam costs more but air-seals and delivers higher R-value per inch, which pays off in older or hard-to-seal homes.

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Cost to insulate an attic or walls.

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How much does attic insulation cost?: Blown-in attic insulation runs about $1.50–$2.50 per square foot installed. A 1,000 sq ft attic often costs $1,500–$2,500.
Is spray foam worth the cost?: Spray foam costs more but air-seals and delivers higher R-value per inch, which pays off in older or hard-to-seal homes.