How much does spray foam insulation cost for 1500 square feet?

Spray foam insulation for 1,500 square feet is priced after an on-site assessment, and qualifying projects may receive 75–100% off insulation upgrades through Mass Save. Actual cost varies most with foam type (open-cell vs closed-cell) and the thickness needed to meet code and comfort goals. In compact attics, closed-cell can act as both insulation and an air/vapor control layer, which changes labor and ventilation requirements. We routinely perform energy assessments and insulation work in the Sharon area.

Expect your quote to reflect:

• Foam selection (open-cell vs closed-cell) and target R-value
• Access and prep needs like removing old insulation, installing baffles, and required fire barriers
• Added scope such as air sealing, moisture fixes, or ventilation adjustments
• Diagnostic testing (infrared/blower-door) and rebate eligibility steps

Schedule a no-cost Mass Save Home Energy Assessment to receive a firm, line-item quote for your home.

Updated: 2026-04-01

Need help in Sharon, MA? Call (508) 501-9990 or book online.