76 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Boulder: Insulation Station, CR Score 83/100; 4.6★ from 20 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Insulation Pros of Colorado, posts 24/7 hours; ranked #2 of 76.
Most-reviewed: EcoShield Pest Solutions, 4,537 Google reviews at 4.7★, the most of 76 ranked; ranked #28.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
76 Boulder insulation contractors are ranked here by CR Score, from 8 published factors. 5 are open 24/7, 41 open Saturdays and 22 open Sundays, based on posted hours. The median Google rating is 4.9★ across 76 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Insulation Station | 83 | 4.6★ (20) | Boulder | Sat · Sun | Overall |
| 2 | Insulation Pros of Colorado | 83 | 4.8★ (37) | Thornton, 19 mi away | 24/7 | Emergencies |
| 3 | One Hour Heating & Air Conditioning® of Denver | 82 | 4.7★ (1,623) | Westminster, 16 mi away | 24/7 | — |
| 4 | The Insulation Guys | 82 | 4.8★ (23) | Longmont, 14 mi away | 24/7 | — |
| 5 | Cenco Roofing | 81 | 4.9★ (839) | Lakewood, 21 mi away | 24/7 | — |
| 6 | Efficiency Revolution, LLC | 80 | 4.9★ (51) | Golden, 20 mi away | Sat · Sun | — |
| 7 | Denver Spray Foam Insulation | 80 | 5.0★ (60) | Aurora, 25 mi away | Sat · Sun · Evenings | — |
| 8 | Extra Care insulation | 79 | 5.0★ (71) | Boulder | — | — |
| 9 | LEV Air Duct Cleaning INC | 79 | 4.6★ (206) | Denver, 25 mi away | Sat · Sun · Evenings | — |
| 10 | PolarPak Foam | 78 | 4.3★ (10) | Longmont, 12 mi away | Sat · Sun | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.6★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thornton, 19 mi away
Ranked #2 because of its Google rating and availability: 4.8★ from 37 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Westminster, 16 mi away
Ranked #3 because of its Google rating and availability: 4.7★ from 1,623 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Longmont, 14 mi away
Ranked #4 because of its Google rating and availability: 4.8★ from 23 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lakewood, 21 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 839 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Golden, 20 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 51 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Aurora, 25 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 60 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Boulder
Ranked #8 because of its Google rating and trade focus: 5.0★ from 71 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Denver, 25 mi away
Ranked #9 because of its Google rating and trade focus: 4.6★ from 206 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Longmont, 12 mi away
Ranked #10 because of its Google rating and trade focus: 4.3★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lafayette, 9 mi away
Ranked #11 because of its Google rating and trade focus: 4.6★ from 64 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arvada, 17 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Denver, 24 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 28 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Boulder
Ranked #14 because of its Google rating and trade focus: 4.8★ from 92 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Aurora, 24 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lakewood, 22 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Longmont, 15 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Boulder
Ranked #18 because of its Google rating and availability: 4.9★ from 23 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thornton, 21 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 67 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Longmont, 15 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thornton, 19 mi away
Ranked #21 because of its Google rating and availability: 4.9★ from 61 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Evans, 21 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Aurora, 20 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Denver, 21 mi away
Ranked #24 because of its Google rating and review volume: 4.7★ from 849 Google reviews, 849 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Aurora, 24 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 28 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 76 ranked insulation contractors here; the rest are on their profiles.
20 more insulation contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| 24-7 Restoration, Inc. | 4.8★ (66) | In Boulder |
| AA Insulation LLC | 5.0★ (2) | 15 mi |
| AirServices Tech Boulder | 4.9★ (8) | In Boulder |
| All City Insulation Llc | 5.0★ (1) | 18 mi |
| Alpha Omega Construction | 5.0★ (1) | 9 mi |
| Black Roofing & Waterproofing | 4.3★ (48) | In Boulder |
| Boulder Roofing | 4.5★ (113) | In Boulder |
| Canyon Plumbing & Heating, Inc | 4.8★ (268) | In Boulder |
| Cottonwood Custom Builders, Inc | 4.8★ (13) | In Boulder |
| ECOS Environmental & Disaster Restoration, Inc. | 4.5★ (41) | In Boulder |
| Elite Insulation Contractors Westminster | 5.0★ (2) | 16 mi |
| Fortunato Insulation | 3.0★ (2) | 15 mi |
| High Mountain Sprayfoam, LLC. | 5.0★ (2) | 19 mi |
| Hybrid Handyman LLC | 5.0★ (1) | 13 mi |
| Ideal Siding Boulder | 4.9★ (40) | In Boulder |
| Melton Design Build | 4.7★ (81) | In Boulder |
| Save Home Heat Company | 4.9★ (833) | In Boulder |
| Skycastle Construction | 5.0★ (34) | In Boulder |
| TLR and Associates Inc. | In Boulder | |
| Witte Home Improvement | 5.0★ (39) | In Boulder |
National price ranges in USD, not adjusted for Boulder. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | $1,700 | $2,100 | $2,500 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range | October 2026 |
We scored 76 Boulder insulation contractors on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Boulder data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |