Top-Rated Insulation Installers in Denver, CO
7 local companies ranked by 516 Google reviews. Free to compare, no sign-up.
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
- 5.0 (58 Google reviews)255 S Cherokee St Apt 2234, Denver, CO 80223
- 4.9 (135 Google reviews)4665 W Warren Ave, Denver, CO 80219
- 4.9 (65 Google reviews)6145 Broadway, Denver, CO 80216
- 5.0 (28 Google reviews)2121 Marion St, Denver, CO 80205
- 4.9 (20 Google reviews)7808 Cherry Creek S Dr #208, Denver, CO 80231
- 4.7 (80 Google reviews)230 S Santa Fe Dr, Denver, CO 80223
- 4.6 (130 Google reviews)677 Alcott St, Denver, CO 80204
Together these 7 companies average 4.8★ across 516 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 not paid for. How we rank and how we make money.
Listed here? Get your top-rated badge for your website or print the Denver rebate sheet for your customers.
What a insulation costs in Denver
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.
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.
Talk to a home energy auditor first. Some utility programs want an audit before any work starts. See the top-rated home energy auditors in Denver.
Get free quotes from these insulation installers
Tick up to 3 companies and tell them what you want done. We send your request straight to them. Free, no obligation.
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 an insulation installer
- Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
- Ask for the R-value before and after for each area, and the material and depth they will install.
- Ask whether your rebate needs an energy assessment before and after the work, and who books it.
- Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).
Questions about insulation installers in Denver
Who is the best insulation installer in Denver?
Based on Google reviews, 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). We rank by a review-weighted score, so companies with many strong reviews rank above those with only a few.
How are the insulation installers in Denver ranked?
We list 7 insulation companies in Denver, ranked by Google rating weighted by review count. Together they have 516 Google reviews and average 4.8 stars, collected September 2026. Insulation Nation | Preferred Xcel Energy Partner | Insulation Contractor in Denver, CO has the most reviews (135). No company pays to be listed or ranked.
How much does insulation cost in Denver?
Insulation prices depend 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.
Are there rebates for insulation in Denver?
Yes. Our verified program data shows insulation rebates up to $500 open in Denver. Most rebates have rules, such as income, your current heating, a registered contractor, or approval before work starts, so check the rebate page before you sign.
Is insulation worth it 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.
What should I ask an insulation installer before I hire?
Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates). Ask for the R-value before and after for each area, and the material and depth they will install. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
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, home energy auditors in Denver.
How to read these results
- Open the profile.How a installer describes its own work tells you a lot. Look for jobs like yours.
- Read the Google reviews.Stars and counts come from Google Maps. Click through and read what past customers wrote, good and bad.
- Check for program badges.A green registered-contractor badge means the company is on the program's own list, which some rebates require.
- Compare three.Do not stop at the first good installer. Three quotes show you the real range in price, equipment and plan.
Not ready to talk to a contractor yet?
Short reads and quick quizzes. Learn the rules first, then call.
Ways to lose it77 Sneaky Ways to Lose Your Rebate (and the Easy Fix for Each)
QuizMyth or true?Heat Pump Myths, Busted: 6 Things Your Brother-in-Law Got Wrong
Questions to ask99 Questions That Make a Heat Pump Installer Sweat (In a Good Way)
See every rebate in Denver
Compare top-rated local installers, ranked by Google reviews, and see the rebates you can stack. Free for homeowners.
See Denver rebates →