Basic
$1.70 – $3.84 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened to the surface, seams taped

Photo: Sealle · CC BY-SA 4.0 · Source
Supply and install rigid polyiso foam board insulation (1-2 in, foil faced) on walls, roof deck or basement, with taped seams and fasteners.
Polyisocyanurate Insulation in Milwaukee, Wisconsin typically costs $2 to $4.51 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 Milwaukee are 3.0% higher than the national average for polyisocyanurate insulation.
National average: $2 – $4.50 per sq ft
$1.70 – $3.84 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened to the surface, seams taped
$2 – $4.51 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened with cap fasteners, all seams taped with foil tape
$2.51 – $5.64 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened, seams taped, edges and penetrations sealed with foam
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.86 – $1.91 | sq ft |
| Labor | labor | $0.77 – $1.76 | sq ft |
| Supplies & Other | supplies | $0.23 – $0.51 | sq ft |
| Equipment & Disposal | equipment | $0.15 – $0.34 | sq ft |
Foil-faced polyiso boards butted at a corner showing the cream foam core
Photo: Sealle · CC BY-SA 4.0 · Source
Find a pro to do thisFoil-faced polyiso boards laid with rebated edges meeting at a right angle
Photo: Sealle · CC BY-SA 4.0 · Source
Find a pro to do thisLabor costs in Milwaukee run proportionally higher than materials, which may favor material-heavy solutions.
Connect with local polyisocyanurate insulation contractors in Milwaukee for personalized quotes based on your specific project.