Install Blown-In Insulation Cost in Washington in 2026
Most Install Blown-In Insulation projects in Washington cost between $1,300 and $5,500. The typical price is $2,700.
Labour and materials in Washington run about 13% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Batt, blown-in cellulose or closed-cell spray foam
- Target R-value for your climate zone
- Attic, wall or crawlspace access
- Air sealing done alongside the insulation
Usually included
- Insulation material to the specified R-value
- Installation and air sealing at obvious gaps
- Cleanup and disposal
Usually extra
- Removing contaminated existing insulation
- Ventilation or moisture remediation
- Drywall work for wall injection
Unit prices in Washington
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $1.11 |
| Mid-range | $2.22 |
| High-end | $4.62 |