23 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Windham: Klaus Larsen Roofing, CR Score 87/100; 4.8★ from 521 Google reviews; open 24/7.
Best for emergencies (open 24/7): RoofMasters, posts 24/7 hours; ranked #11 of 23.
Most-reviewed: Homestead Comfort, 787 Google reviews at 4.7★, the most of 23 ranked; ranked #15.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
23 Windham insulation contractors are ranked here by CR Score, from 8 published factors. 2 are open 24/7, 11 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 4.8★ across 23 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Klaus Larsen Roofing | 87 | 4.8★ (521) | Hebron, 3 mi away | 24/7 | Overall |
| 2 | Anchor Home Inspection | 82 | 5.0★ (611) | East Haddam, 17 mi away | Evenings | — |
| 3 | Best Home Performance | 82 | 4.6★ (43) | East Haddam, 13 mi away | Sat · Sun | — |
| 4 | RI Choice Spray Foam Inc. | 80 | 4.7★ (31) | Coventry, 21 mi away | Sat · Sun · Evenings | — |
| 5 | Hartford Building Company LLC | 77 | 5.0★ (6) | Glastonbury, 22 mi away | Sat · Sun | — |
| 6 | Priority Inc. | 76 | 5.0★ (24) | East Hartford, 24 mi away | Sat · Evenings | — |
| 7 | C & R Insulation Inc | 76 | 4.6★ (18) | Hebron, 4 mi away | — | — |
| 8 | JT Energy LLC | 76 | 4.9★ (33) | South Windsor, 25 mi away | Sat | — |
| 9 | Koala Insulation of Eastern Connecticut | 76 | 4.9★ (83) | Manchester, 19 mi away | — | — |
| 10 | Koala Insulation of Central Connecticut | 76 | 5.0★ (158) | Cromwell, 25 mi away | — | — |
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 availability: 4.8★ from 521 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Haddam, 17 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 611 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Haddam, 13 mi away
Ranked #3 because of its Google rating and trade focus: 4.6★ from 43 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Coventry, 21 mi away
Ranked #4 because of its Google rating and trade focus: 4.7★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Glastonbury, 22 mi away
Ranked #5 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 East Hartford, 24 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hebron, 4 mi away
Ranked #7 because of its Google rating and trade focus: 4.6★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in South Windsor, 25 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Manchester, 19 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 83 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cromwell, 25 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 158 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Norwich, 11 mi away
Ranked #11 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Norwich, 9 mi away
Ranked #12 because of its Google rating and trade focus: 4.3★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Coventry, 25 mi away
Ranked #13 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Bridgeport, 5 mi away
Ranked #14 because of its Google rating and availability: 5.0★ from 12 Google reviews, open Saturdays until 1 PM.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ellington, 20 mi away
Ranked #15 because of its Google rating and review volume: 4.7★ from 787 Google reviews, the most Google reviews on this list (787).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Norwich, 11 mi away
Ranked #16 because of its Google rating and trade focus: 3.7★ from 26 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Grafton, 24 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Haddam, 25 mi away
Ranked #18 because of its Google rating and review volume: 4.9★ from 53 Google reviews, 53 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Hartford, 23 mi away
Ranked #19 because of its Google rating and availability: 4.3★ from 11 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Haddam, 14 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in East Haddam, 13 mi away
Ranked #21 because of its Google rating and review volume: 4.7★ from 82 Google reviews, 82 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Groton, 25 mi away
Ranked #22 because of its Google rating and trade focus: 4.5★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Groton, 22 mi away
Ranked #23 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Kitchen remodeler”.
Based on 6 of 8 factors; credentials and recency not yet collected.
13 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 |
|---|---|---|
| Alex's Energy Insulation Construction LLC | 5.0★ (2) | 12 mi |
| Best Noise Control | 24 mi | |
| Connecticut Spray Foam LLC | 1.0★ (1) | 23 mi |
| Green Energy Insulation & Chimney Caps and Covers ltd | 5 mi | |
| H J Houle & Son | 22 mi | |
| Manchester | 5.0★ (1) | 17 mi |
| Mega Innovations LLC | 5 mi | |
| Pro Insulation | 1.0★ (1) | 17 mi |
| R & R Insulators LLC | 9 mi | |
| R-Value Insulation LLC | 5.0★ (1) | 19 mi |
| R-Value Insulation LLC | 14 mi | |
| Richard Chimney Inspection Services, PA | 4.6★ (10) | In Windham |
| USA Insulation of Eastern Connecticut | 16 mi |
National price ranges in USD, not adjusted for Windham. 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 23 Windham 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 Windham 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 |