Insulation Cost in Montana in 2026
Most Insulation projects in Montana cost between $1,400 and $6,000. The typical price is $2,800.
Labour and materials in Montana run about 3% below 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 Montana
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $1.18 |
| Mid-range | $2.35 |
| High-end | $4.90 |