Basic
$1.07 – $2.53 per sq ft
R-20 fiberglass batts friction-fit in 2x6 wall cavities, cut around boxes and pipes
How Much Does R20 Insulation Cost in Seattle, Washington?
Supply and install R-20 insulation (2x6 wall batts or equivalent blown/dense-pack) in exterior wall cavities.
R20 Insulation in Seattle, Washington typically costs $1.25 to $2.98 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
R20 Insulation in Seattle, Washington
$1.25 – $2.98
per sq ftPrices in Seattle are 19.0% higher than the national average for r20 insulation.
National average: $1.10 – $2.60 per sq ft
What you get at each price level
Standard
$1.26 – $2.98 per sq ft
Kraft-faced R-20 batts stapled to studs, split around wiring, cut tight at boxes, top and bottom plates fully filled
Premium
$1.57 – $3.72 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
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.53 – $1.22 | sq ft |
| Labor | labor | $0.50 – $1.22 | sq ft |
| Supplies & Other | supplies | $0.16 – $0.32 | sq ft |
| Equipment & Disposal | equipment | $0.07 – $0.22 | sq ft |
Prices adjusted for Seattle local market conditions.
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($0.51-$1.17 per square foot)
- Labor ($0.37-$0.91 per square foot)
- Supplies & Other ($0.15-$0.31 per square foot)
- Equipment & Disposal ($0.07-$0.21 per square foot)
Local Price Adjustments
Material costs4.0% above avg
Labor costs34.0% above avg
Labor costs in Seattle run proportionally higher than materials, which may favor material-heavy solutions.
Frequently Asked Questions
References
- Insulation Installation Cost Per Sq Ft (2026), EZ-Estimates, ez-estimates.com, 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 Seattle
Connect with local r20 insulation contractors in Seattle for personalized quotes based on your specific project.