Basic
$1.21 – $2.92 per sq ft
Loose-fill fiberglass blown over the attic floor to an R-49 settled depth of about 16-18 in., eave baffles and depth markers set
How Much Does R50 Insulation Cost in Seattle, Washington?
Supply and install insulation to about R-49/R-50 in an attic (blown fiberglass/cellulose ~16-18 in., or thick batts), per sq ft; old insulation removal and air sealing extra.
R50 Insulation in Seattle, Washington typically costs $1.43 to $3.44 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
R50 Insulation in Seattle, Washington
$1.43 – $3.44
per sq ftPrices in Seattle are 19.0% higher than the national average for r50 insulation.
National average: $1.25 – $3 per sq ft
What you get at each price level
Standard
$1.43 – $3.44 per sq ft
Blown fiberglass to R-49 with foam baffles at the eave bays, hatch dam, clearance kept around flues and lights
Premium
$1.79 – $4.29 per sq ft
Blown cellulose to R-50 with settling allowance, baffles at every eave bay, hatch dam with an insulated hatch cover, depth markers
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.59 – $1.40 | sq ft |
| Labor | labor | $0.58 – $1.41 | sq ft |
| Supplies & Other | supplies | $0.16 – $0.37 | sq ft |
| Equipment & Disposal | equipment | $0.10 – $0.25 | sq ft |
Prices adjusted for Seattle local market conditions.
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($0.57-$1.35 per square foot)
- Labor ($0.43-$1.05 per square foot)
- Supplies & Other ($0.15-$0.36 per square foot)
- Equipment & Disposal ($0.10-$0.24 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
- The Roofing Brief - R-50 Insulation (2026), theroofingbrief.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
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