Basic
$0.92 – $2.17 per sq ft
R-20 fiberglass batts friction-fit in 2x6 wall cavities, cut around boxes and pipes
Supply and install R-20 insulation (2x6 wall batts or equivalent blown/dense-pack) in exterior wall cavities.
R20 Insulation in Portland, Maine typically costs $1.08 to $2.55 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 Portland are 1.0% lower than the national average for r20 insulation.
National average: $1.10 – $2.60 per sq ft
$0.92 – $2.17 per sq ft
R-20 fiberglass batts friction-fit in 2x6 wall cavities, cut around boxes and pipes
$1.08 – $2.55 per sq ft
Kraft-faced R-20 batts stapled to studs, split around wiring, cut tight at boxes, top and bottom plates fully filled
$1.35 – $3.19 per sq ft
Kraft-faced R-20 batts stapled to studs and fitted without gaps, split around wiring, cut tight at boxes, plates fully filled, window gaps filled
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.49 – $1.13 | sq ft |
| Labor | labor | $0.37 – $0.91 | sq ft |
| Supplies & Other | supplies | $0.15 – $0.30 | sq ft |
| Equipment & Disposal | equipment | $0.07 – $0.20 | sq ft |
Connect with local r20 insulation contractors in Portland for personalized quotes based on your specific project.