87/100CR Score
Ranked #1 because of its Google rating and availability: 4.8★ from 521 Google reviews, open 24/7.
- 4.8★ from 521 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 29 Northridge Dr, North Windham, CT 06256
Best Insulation Contractors in Willimantic, CT (2026)
27 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Willimantic: Klaus Larsen Roofing, CR Score 87/100; 4.8★ from 521 Google reviews; open 24/7.
- 13
Best for emergencies (open 24/7): RoofMasters, posts 24/7 hours; ranked #13 of 27.
- 16
Most-reviewed: Homestead Comfort, 787 Google reviews at 4.7★, the most of 27 ranked; ranked #16.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
27 Willimantic insulation contractors are ranked here by CR Score, from 8 published factors. 2 are open 24/7, 14 open Saturdays and 7 open Sundays, based on posted hours. The median Google rating is 4.8★ across 27 rated businesses.
Top 10 insulation contractors in Willimantic at a glance
| 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 | Best Home Performance | 82 | 4.6★ (43) | East Haddam, 12 mi away | Sat · Sun | — |
| 3 | Anchor Home Inspection | 82 | 5.0★ (611) | East Haddam, 17 mi away | Evenings | — |
| 4 | RI Choice Spray Foam Inc. | 79 | 4.7★ (31) | Coventry, 24 mi away | Sat · Sun · Evenings | — |
| 5 | Fogarty's Home Services | 79 | 4.8★ (168) | Hartford, 24 mi away | Sat | — |
| 6 | Precision | 78 | 5.0★ (23) | Ellington, 24 mi away | Sat · Sun · Evenings | — |
| 7 | Hartford Building Company LLC | 78 | 5.0★ (6) | Glastonbury, 20 mi away | Sat · Sun | — |
| 8 | Priority Inc. | 77 | 5.0★ (24) | East Hartford, 22 mi away | Sat · Evenings | — |
| 9 | JT Energy LLC | 77 | 4.9★ (33) | South Windsor, 22 mi away | Sat | — |
| 10 | Koala Insulation of Eastern Connecticut | 77 | 4.9★ (83) | Manchester, 17 mi away | — | — |
The 27 best insulation contractors in Willimantic, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in East Haddam, 12 mi away
82/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.6★ from 43 Google reviews, listed on Google as “Insulation contractor”.
- 4.6★ from 43 Google reviews
- Hours
- Mon–Sun 8 AM–4 PM
- Address
- 247 Old Hartford Rd, Colchester, CT 06415
Based in East Haddam, 17 mi away
82/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 611 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 611 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat–Sun closed
- Address
- 16 Deer Trail, Montville, CT 06370
Based in Coventry, 24 mi away
79/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.7★ from 31 Google reviews, listed on Google as “Insulation contractor”.
- 4.7★ from 31 Google reviews
- Hours
- Mon–Sat 7 AM–7 PM · Sun 9 AM–5 PM
- Address
- 6222 Flat River Rd, Coventry, RI 02827
Based in Hartford, 24 mi away
79/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.8★ from 168 Google reviews, listed on Google as “Insulation contractor”.
- 4.8★ from 168 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 10 AM–2 PM · Sun closed
#6 Precision
Based in Ellington, 24 mi away
78/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 23 Google reviews
- Hours
- Mon–Fri 7 AM–7 PM · Sat 8 AM–6 PM · Sun 8 AM–5 PM
Based in Glastonbury, 20 mi away
78/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 6 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat–Sun 7 AM–3 PM
- Address
- 22 Kreiger Ln, Glastonbury, CT 06033
Based in East Hartford, 22 mi away
77/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 24 Google reviews
- Hours
- Mon–Sat 7 AM–7 PM · Sun closed
- Address
- 23 Elms Village Dr, East Hartford, CT 06118
Based in South Windsor, 22 mi away
77/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 33 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 33 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 8 AM–12 PM · Sun closed
- Address
- 200 Burnham St, South Windsor, CT 06074
Based in Manchester, 17 mi away
77/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 83 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 83 Google reviews
- Hours
- Mon 8 AM–5 PM · Tue 8 AM–6 PM · Wed 8 AM–5 PM · Thu 8 AM–6 PM · Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 90 Progress Dr, Manchester, CT 06042
Based in Cromwell, 22 mi away
77/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 158 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 158 Google reviews
- Hours
- Mon–Fri 8:30 AM–4 PM · Sat–Sun closed
- Address
- 148 Dividend Rd Unit A, Rocky Hill, CT 06067
Based in Hebron, 6 mi away
76/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.6★ from 18 Google reviews, listed on Google as “Insulation contractor”.
- 4.6★ from 18 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat–Sun closed
- Address
- 784 CT-32, North Franklin, CT 06254
#13 RoofMasters
Based in Norwich, 14 mi away
75/100CR ScoreRanked #13 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
- 5.0★ from 3 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7 School St, Griswold, CT 06351
Based in Cromwell, 25 mi away
74/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 11 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 10 AM–2 PM · Sun closed
- Address
- 1275 Cromwell Ave STE B-14, Rocky Hill, CT 06067
Based in Norwich, 11 mi away
73/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.3★ from 9 Google reviews, listed on Google as “Insulation contractor”.
- 4.3★ from 9 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 43 Wisconsin Ave, Norwich, CT 06360
Based in Ellington, 18 mi away
72/100CR ScoreRanked #16 because of its Google rating and review volume: 4.7★ from 787 Google reviews, the most Google reviews on this list (787).
- 4.7★ from 787 Google reviews
- Hours
- Mon–Fri 7:30 AM–4 PM · Sat–Sun closed
- Address
- 100 West Rd #2, Ellington, CT 06029
#17 Best
Based in Windsor, 25 mi away
71/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Insulation contractor”.
- 4.8★ from 16 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat 9 AM–3 PM · Sun closed
- Address
- 77 Pierson Ln unit e, Windsor, CT 06095
Based in Glastonbury Center, 25 mi away
71/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 16 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
Based in East Hartford, 20 mi away
71/100CR ScoreRanked #19 because of its Google rating and availability: 4.3★ from 11 Google reviews, open 7 days a week.
- 4.3★ from 11 Google reviews
- Hours
- Mon–Fri 7 AM–8 PM · Sat–Sun 8 AM–6 PM
- Address
- 149 Cannon Rd, East Hartford, CT 06108
Based in Norwich, 13 mi away
71/100CR ScoreRanked #20 because of its Google rating and trade focus: 3.7★ from 26 Google reviews, listed on Google as “Insulation contractor”.
- 3.7★ from 26 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 505 Norwich Ave, Taftville, CT 06380
Based in East Haddam, 24 mi away
71/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 53 Google reviews, 53 Google reviews.
- 4.9★ from 53 Google reviews
- Hours
- Mon–Sat 8 AM–8 PM · Sun closed
#22 Flag Services
Based in Bridgeport, 8 mi away
71/100CR ScoreRanked #22 because of its Google rating and availability: 5.0★ from 12 Google reviews, open Saturdays until 1 PM.
- 5.0★ from 12 Google reviews
- Hours
- Mon–Fri 7 AM–6 PM · Sat 7 AM–1 PM · Sun closed
#23 Collins & Co
Based in Ellington, 25 mi away
71/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.5★ from 28 Google reviews, listed on Google as “Insulation contractor”.
- 4.5★ from 28 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 23 Thompson Rd, East Windsor, CT 06088
Based in East Haddam, 13 mi away
70/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 16 Nelkin Rd, Colchester, CT 06415
Based in East Haddam, 12 mi away
70/100CR ScoreRanked #25 because of its Google rating and review volume: 4.7★ from 82 Google reviews, 82 Google reviews.
- 4.7★ from 82 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 100 Linwood Ave Suite 200, Colchester, CT 06415
All 27 insulation contractors
#1 to #25 are shown in full above. Here are #26 to #27, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Solutions of CT | 64 | 4.6★ (21) | 23 mi |
| 27 | Gencarella Drywall & Remodeling | 62 | 4.3★ (6) | 20 mi |
Also serving Willimantic
16 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) | 10 mi |
| Connecticut Spray Foam LLC | 1.0★ (1) | 20 mi |
| Eman Home | 25 mi | |
| Green Energy Insulation & Chimney Caps and Covers ltd | 5 mi | |
| H J Houle & Son | 21 mi | |
| Manchester | 5.0★ (1) | 14 mi |
| Mega Innovations LLC | 8 mi | |
| Northeast Refrigeration & Insulation Inc | 25 mi | |
| Pro Insulation | 1.0★ (1) | 15 mi |
| R & R Insulators LLC | 12 mi | |
| R-Value Insulation LLC | 5.0★ (1) | 18 mi |
| R-Value Insulation LLC | 16 mi | |
| Restored Insulation Services Co | 25 mi | |
| Rigid Mason Contractors Inc | 5.0★ (1) | 25 mi |
| TC Daimyo House Restoration And Attic Insulation Services,Hartford, CT | 5.0★ (2) | 24 mi |
| USA Insulation of Eastern Connecticut | 18 mi |
How much do insulation contractors cost in Willimantic?
National price ranges in USD, not adjusted for Willimantic. 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 |
How we ranked Willimantic insulation contractors
We scored 27 Willimantic 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 Willimantic 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 |
Insulation contractors in Willimantic: frequently asked questions
Who is the best insulation contractor in Willimantic?
By CR Score, the highest-ranked insulation contractor in Willimantic, CT is Klaus Larsen Roofing with a CR Score of 87/100. It has 4.8★ from 521 Google reviews. It is open 24/7. Best Home Performance (#2) and Anchor Home Inspection (#3) follow. We ranked 27 insulation contractors on 8 factors, last updated October 22, 2026.
How many insulation contractors are there in Willimantic?
ContractorsRanked ranks 27 insulation contractors serving Willimantic, CT. Another 16 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which insulation contractors in Willimantic are open 24/7?
2 ranked insulation contractors in Willimantic post 24/7 hours. The highest-ranked are Klaus Larsen Roofing (#1) and RoofMasters (#13). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which insulation contractors in Willimantic work on weekends?
14 of 27 ranked insulation contractors post Saturday hours and 7 post Sunday hours. The highest-ranked open Saturdays are Klaus Larsen Roofing (#1), Best Home Performance (#2) and RI Choice Spray Foam Inc. (#4). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in Willimantic?
Attic insulation typically costs $1,700 to $2,500, with $2,100 typical (Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range). This is a national range, not adjusted for Willimantic. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Willimantic insulation contractors have?
The median Google rating among 27 rated insulation contractors in Willimantic is 4.8★, with a median of 24 reviews. Homestead Comfort has the most, 787 reviews, and ranks #16. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank insulation contractors?
Each insulation contractor gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do insulation contractors outside Willimantic count in this ranking?
Yes, if they are within 25 mi of the Willimantic city center, our service radius for insulation contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Update log for Willimantic
- October 2026: CR Scores recalculated for 27 insulation contractors serving Willimantic.
More insulation contractors and Willimantic pages
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