Basic
$1.18 – $2.76 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
How Much Does PIR Insulation Cost in Charleston, South Carolina?
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 Charleston, South Carolina typically costs $1.39 to $3.25 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
PIR Insulation in Charleston, South Carolina
$1.39 – $3.25
per sq ftPrices in Charleston are 8.0% lower than the national average for pir insulation.
National average: $1.50 – $3.50 per sq ft
What you get at each price level
Standard
$1.39 – $3.25 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
Premium
$1.74 – $4.06 per sq ft
1-1/2 in. foil-faced polyiso board (around R-9), fastened, seams taped, perimeter and penetrations foam-sealed
Cost Breakdown in Charleston
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.65 – $1.51 | sq ft |
| Labor | labor | $0.45 – $1.06 | sq ft |
| Supplies & Other | supplies | $0.17 – $0.41 | sq ft |
| Equipment & Disposal | equipment | $0.12 – $0.27 | sq ft |
Prices adjusted for Charleston local market conditions.
PIR Insulation photo examples
Corner of foil-faced PIR insulation boards with stepped edges
Photo: Sealle · CC BY-SA 4.0 · Source
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Cost Factors in Charleston, South Carolina
What Affects Pricing
- Materials ($0.68-$1.57 per square foot)
- Labor ($0.52-$1.22 per square foot)
- Supplies & Other ($0.18-$0.43 per square foot)
- Equipment & Disposal ($0.12-$0.28 per square foot)
Local Price Adjustments
Material costs4.0% below avg
Labor costs13.0% below avg
Material costs in Charleston run proportionally higher than labor, which may favor labor-intensive approaches.
Frequently Asked Questions
References
- Rigid Insulation Cost Per Square Foot 2026 - One and Done Prep, One and Done Prep, retrieved Nov 2026
- Get the Right Rigid Foam - Fine Homebuilding, Fine Homebuilding, retrieved Nov 2026
- Construction wages by metro and rural area, used for the labor adjustment by ZIP code, U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025
- Regional price parities for goods, used for the materials adjustment by ZIP code, U.S. Bureau of Economic Analysis, 2024
Get Free Estimates in Charleston
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