Fiberglass Insulation Cost in Libby, MT

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

Cold-dry · Libby
IECC climate zone 6B
Long heating season — R-49 to R-60 attic is the DOE recommendation here.
Nationwide · MT eligible
Federal 25C tax credit
Every MT homeowner qualifies for the federal 25C credit up to $1,200/yr on qualifying insulation.
Federal 25C
Claim up to $1,200 in federal credits
Federal 25C credit up to $1,200/yr on materials
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Sample project estimates

Rough budgeting based on typical Libby 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 Libby

  • 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 Libby can push prices 10–15% higher.

Rebates & tax credits

Most Libby 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 Libby 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 Libby homeowners with vetted local insulation contractors.

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