Basic
$1.40 – $3.49 per sq ft
1-1/2 in. XPS rigid foam board (about R-7.5), fastened to the wall, seams taped

Supply and install rigid foam board (EPS/XPS/polyiso, ~1-2 in) on walls, basement or foundation, taped and fastened, materials and labor.
Foam Board Insulation in Boston, Massachusetts typically costs $1.65 to $4.10 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Boston are 14.0% higher than the national average for foam board insulation.
National average: $1.50 – $3.75 per sq ft
$1.40 – $3.49 per sq ft
1-1/2 in. XPS rigid foam board (about R-7.5), fastened to the wall, seams taped
$1.65 – $4.10 per sq ft
1-1/2 in. XPS rigid foam board (about R-7.5), adhesive and fasteners, staggered joints, seams taped
$2.06 – $5.13 per sq ft
1-1/2 in. XPS rigid foam board (about R-7.5), adhesive and fasteners, staggered joints, seams taped, edges and penetrations sealed with foam
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.66 – $1.69 | sq ft |
| Labor | labor | $0.69 – $1.66 | sq ft |
| Supplies & Other | supplies | $0.18 – $0.45 | sq ft |
| Equipment & Disposal | equipment | $0.12 – $0.30 | sq ft |

Cut edge of grey graphite EPS rigid foam insulation board showing bead structure
Photo: Cjp24 · CC BY-SA 4.0 · Source

Foil-faced rigid foam board fastened over roof framing with wood battens
Labor costs in Boston run proportionally higher than materials, which may favor material-heavy solutions.
Connect with local foam board insulation contractors in Boston for personalized quotes based on your specific project.