Top-Rated Insulation Installers in Denver, CO

8 local companies ranked by 577 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

8Companies
577Google reviews
4.8★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

Short answer: The top-rated insulation installers in Denver are Denver Spray Foam Insulation (5.0★, 58 reviews), Insulation Nation | Preferred Xcel Energy Partner | Insulation Contractor in Denver, CO (4.9★, 135 reviews), Simple Home Energy Solutions (4.9★, 65 reviews).

Insulation installers in Denver, ranked 8 listed

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  1. 1
    Denver Spray Foam InsulationTop pickHighest rating (50+ reviews)
    5.0 (58 Google reviews)
    255 S Cherokee St Apt 2234, Denver, CO 80223
    Call (303) 529-4249WebsiteGoogle reviewsDirectionsEmail [email protected]
  2. 2
    Insulation Nation | Preferred Xcel Energy Partner | Insulation Contractor in Denver, COTop pickMost reviews
    4.9 (135 Google reviews)
    4665 W Warren Ave, Denver, CO 80219
    Call (720) 410-9414WebsiteGoogle reviewsDirectionsEmail [email protected]
  3. 3
    Simple Home Energy SolutionsTop pick
    4.9 (65 Google reviews)
    6145 Broadway, Denver, CO 80216
    Call (720) 242-6740WebsiteGoogle reviewsDirections
  4. 4
    OnPoint Denver
    5.0 (28 Google reviews)
    2121 Marion St, Denver, CO 80205
    Call (720) 702-9660WebsiteGoogle reviewsDirections
  5. 5
    IDI: Insulation Distributors Inc.
    4.8 (61 Google reviews)
    5000 Dahlia St Ste B, Denver, CO 80216
    Call (303) 377-4430WebsiteGoogle reviewsDirectionsEmail [email protected]
  6. 6
    iFOAM Insulation
    4.9 (20 Google reviews)
    7808 Cherry Creek S Dr #208, Denver, CO 80231
    Call (303) 800-0396WebsiteGoogle reviewsDirections
  7. 7
    Mucilli Brothers
    4.7 (80 Google reviews)
    230 S Santa Fe Dr, Denver, CO 80223
    Call (720) 204-8414WebsiteGoogle reviewsDirections
  8. 8
    Rocky Mountain LLC
    4.6 (130 Google reviews)
    677 Alcott St, Denver, CO 80204
    Call (720) 676-6333WebsiteGoogle reviewsDirections

Together these 8 companies average 4.8★ across 577 reviews. Insulation Nation | Preferred Xcel Energy Partner | Insulation Contractor in Denver, CO has the most reviews (135).

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 Denver

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 Denverup to $500

That could cut your cost by up to $500 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.

Get free quotes from these insulation installers

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Why insulation matters in Denver

In Denver, the average January low is -9°C (15°F), colder than 84% 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 Denver. 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 Denver.

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