Open Cell Spray Foam Portsmouth NH | Smooth Construction Services

Open Cell Spray Foam in Portsmouth, New Hampshire

Open cell spray foam insulation in Portsmouth, New Hampshire provides excellent air sealing and thermal performance at a lower cost than closed-cell foam. With an R-value of R-3.7 per inch and outstanding sound dampening, it is the ideal choice for interior wall cavities, attic ceilings, and cathedral ceiling assemblies in Portsmouth area homes and commercial buildings.

Why Choose Smooth for Open Cell Spray Foam in Portsmouth

✓R-3.7 per inch — good thermal value at lower cost
✓Expands 100x — fills every gap, crack, and irregular cavity
✓Outstanding soundproofing for interior walls and floors
✓Vapor-permeable — works with proper moisture management in Portsmouth's climate
✓Energy-efficient installation for qualifying Massachusetts homeowners
✓Faster installation than closed-cell — most projects completed in one day

Also Serving Nearby Rockingham Communities

Salem Derry Londonderry Exeter Hampton

Energy Efficiency Review

Up to 100%

For qualifying Portsmouth homeowners

Also in Rockingham

▸ All Services in Portsmouth ▸ Open Cell Spray Foam Overview ▸ All Service Areas

FAQ

Open Cell Spray Foam Portsmouth NH — Common Questions

In Portsmouth and surrounding communities, open cell spray foam typically costs $0.44–$0.65 per board foot installed. A typical attic or wall cavity project runs $1,500–$5,000 before energy-efficiency improvements. Call 857-214-2434 for a free, site-specific estimate.

Open cell foam is the right choice for interior wall cavities, attic roof deck applications (conditioned attic), and interior floor assemblies in Portsmouth area homes. For basements, crawl spaces, and rim joists in Portsmouth's cold climate, closed-cell foam is the better choice.

Massachusetts requires a minimum of R-49 in attics. Open cell foam achieves R-3.7 per inch — requiring approximately 13 inches to meet code. Given Portsmouth's cold coastal NH winters with high wind-driven infiltration, we typically recommend installing to R-49 to R-60 for maximum energy savings.

Yes. As a certified energy efficiency contractor, Smooth helps Portsmouth homeowners access incentives covering 75–100% of qualifying insulation projects. We handle all paperwork.

Free Estimate — Open Cell Spray Foam in Portsmouth, NH

Response within 2 hours. Project scope reviewed. Serving Portsmouth and all Rockingham communities.

Open Cell Spray Foam Portsmouth, NH