Fiberglass Insulation Cost in Bonner, MT

In Bonner, fiberglass insulation typically runs $0.80–$2.50 per sq ft, with the average homeowner paying around $1.50 per sq ft.

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Sample project estimates

Rough budgeting based on typical Bonner pricing.

Project sizeLowAverageHigh
800 sq ft$640$1,200$2,000
1,500 sq ft$1,200$2,250$3,750
2,400 sq ft$1,920$3,600$6,000

What affects fiberglass insulation cost in Bonner

  • Project size and access: larger projects cost more in total but less per unit. Hard access (steep roofs, low crawl space) adds labor.
  • Final R-value or thickness: R-49 attics cost more than R-30, but qualify for higher rebates.
  • Removal of old insulation: contaminated or damaged material needs to come out first.
  • Air sealing scope: bundling air sealing with insulation is cheaper than two separate visits.
  • Local demand: peak winter and summer months in Bonner can push prices 10–15% higher.

Rebates & tax credits

Most Bonner homeowners cut their out-of-pocket cost with the federal 25C tax credit (30% of materials, up to $1,200/year) and MT state and utility rebates.

How to get an accurate quote

  1. Submit your project details using the form on this page.
  2. A local Bonner insulation contractor follows up to schedule a free measurement.
  3. You receive a written quote with final R-value, scope, and price.
  4. Compare 2 quotes side by side before committing.

Related

Compare fiberglass insulation vs. alternatives

Common questions

Short answers about how we match fiberglass insulation cost in Bonner homeowners with vetted local insulation contractors.

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