Top-Rated Insulation Installers in Fort Collins, CO

4 local companies ranked by 94 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

4Companies
94Google reviews
4.5★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

Short answer: The top-rated insulation installers in Fort Collins are Frontier Insulation Fort Collins (4.8★, 24 reviews), This Efficient House (4.5★, 24 reviews), Insulation Pros of Colorado-Loveland (4.3★, 18 reviews).

Insulation installers in Fort Collins, ranked 4 listed

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  1. 1
    Frontier Insulation Fort CollinsTop pick
    4.8 (24 Google reviews)
    610 City Park Ave, Fort Collins, CO 80521
    Call (970) 464-8089WebsiteGoogle reviewsDirections
  2. 2
    This Efficient HouseTop pick
    4.5 (24 Google reviews)
    1600 Crescent Dr, Fort Collins, CO 80526
    Call (970) 204-9931WebsiteGoogle reviewsDirectionsEmail [email protected]
  3. 3
    Insulation Pros of Colorado-LovelandTop pick
    4.3 (18 Google reviews)
    4803 Innovation Dr #4, Fort Collins, CO 80525
    Call (970) 980-6455WebsiteGoogle reviewsDirectionsEmail [email protected]
  4. 4
    L&L InsulationMost reviews
    4.3 (28 Google reviews)
    401 N Link Ln Unit B, Fort Collins, CO 80524
    Call (970) 221-3180WebsiteGoogle reviewsDirections

Together these 4 companies average 4.5★ across 94 reviews. L&L Insulation has the most reviews (28).

Ranked by Google rating weighted by review count, collected September 2026. Rankings are never paid for. How we rank and how we make money.

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What a insulation costs in Fort Collins

Typical installed priceVaries by area

Price depends on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.

Insulation rebates open in Fort Collinsup to $2,000

That could cut your cost by up to $2,000 if you qualify. Most rebates have rules (income, your current heating, a registered contractor, approval before work starts).

Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.

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Why insulation matters in Fort Collins

In Fort Collins, the average January low is -9°C (16°F), colder than 80% of the 123 cities we track. Sealing air leaks and topping up the attic usually pays back fastest here. Basement walls and rim joists are often the next biggest heat loss in older homes.

Most rebate programs pay only after an energy assessment, and some need one before the work too. Book it first.

Source: Open-Meteo historical weather data, 2015-2024.

Before you hire a insulation installer

  1. Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
  2. Ask for the R-value before and after for each area, and the material and depth they will install.
  3. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
  4. Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).

Before you call anyone, check what insulation rebates you can get in Fort Collins. Many programs require approval or a registered contractor before work starts.

Planning more upgrades? See the top-rated heat pump installers, solar installers, home battery installers in Fort Collins.

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