Basic
$1.20 – $2.80 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened with screws and washers, seams taped

Photo: Sealle · CC BY-SA 4.0 · Source
Supply and install 1-2 in foil-faced PIR (polyiso) rigid board insulation on walls, ceilings or roof deck, with taped seams and fasteners.
PIR Insulation in Boise, Idaho typically costs $1.41 to $3.30 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 Boise are 6.0% lower than the national average for pir insulation.
National average: $1.50 – $3.50 per sq ft
$1.20 – $2.80 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened with screws and washers, seams taped
$1.41 – $3.30 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened with cap fasteners, tight joints, all seams taped with foil tape
$1.77 – $4.12 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened, seams taped, perimeter and penetrations foam-sealed
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.65 – $1.51 | sq ft |
| Labor | labor | $0.47 – $1.11 | sq ft |
| Supplies & Other | supplies | $0.17 – $0.41 | sq ft |
| Equipment & Disposal | equipment | $0.12 – $0.27 | sq ft |
Corner of foil-faced PIR insulation boards with stepped edges
Photo: Sealle · CC BY-SA 4.0 · Source
Find a pro to do thisConnect with local pir insulation contractors in Boise for personalized quotes based on your specific project.