59/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 96 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 96 Google reviews
- Hours
- Mon–Sat 7 AM–7 PM · Sun 7 AM–5 PM
Best Insulation Contractors in South Windsor, CT (2026)
53 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in South Windsor: Eco Energy Guard LLC, CR Score 59/100; 5.0★ from 96 Google reviews; open 7 days a week.
- 13
Best for emergencies (open 24/7): Klaus Larsen Roofing, posts 24/7 hours; ranked #13 of 53.
- 20
Most-reviewed: Homestead Comfort, 787 Google reviews at 4.7★, the most of 53 ranked; ranked #20.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
53 South Windsor insulation contractors are ranked here by CR Score, from ten published factors. 4 are open 24/7, 29 open Saturdays and 13 open Sundays, based on posted hours. The median Google rating is 4.8★ across 53 rated businesses.
Top 10 insulation contractors in South Windsor at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Eco Energy Guard LLC | 59 | 5.0★ (96) | Farmington, 13 mi away | Sat · Sun · Evenings | Overall |
| 2 | Precision | 59 | 5.0★ (23) | Ellington, 4 mi away | Sat · Sun · Evenings | — |
| 3 | JT Energy LLC | 58 | 4.9★ (33) | South Windsor | Sat | — |
| 4 | Fogarty's Home Services | 58 | 4.8★ (168) | Hartford, 13 mi away | Sat | — |
| 5 | Koala Insulation of Central Connecticut | 57 | 5.0★ (158) | Cromwell, 12 mi away | — | — |
| 6 | Koala Insulation of Eastern Connecticut | 57 | 4.9★ (83) | Manchester, 6 mi away | — | — |
| 7 | Priority Spray Foam | 57 | 5.0★ (23) | Hartford, 5 mi away | Sat · Evenings | — |
| 8 | Priority Inc. | 57 | 5.0★ (24) | East Hartford, 6 mi away | Sat · Evenings | — |
| 9 | Best | 56 | 4.8★ (16) | Windsor, 3 mi away | Sat | — |
| 10 | Connecticut Spray Foam Insulation | 56 | 5.0★ (36) | West Hartford, 5 mi away | — | — |
The 53 best insulation contractors in South Windsor, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
#2 Precision
Based in Ellington, 4 mi away
59/100CR ScoreRanked #2 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 South Windsor
58/100CR ScoreRanked #3 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 Hartford, 13 mi away
58/100CR ScoreRanked #4 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
Based in Cromwell, 12 mi away
57/100CR ScoreRanked #5 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 Manchester, 6 mi away
57/100CR ScoreRanked #6 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 Hartford, 5 mi away
57/100CR ScoreRanked #7 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–Sat 7 AM–7 PM · Sun closed
- Address
- 41 Irving St, Hartford, CT 06112
Based in East Hartford, 6 mi away
57/100CR 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
#9 Best
Based in Windsor, 3 mi away
56/100CR ScoreRanked #9 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 West Hartford, 5 mi away
56/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 36 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 36 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
- Address
- 200 Bloomfield Ave #3868, West Hartford, CT 06117
Based in Glastonbury, 8 mi away
55/100CR ScoreRanked #11 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
#12 Ari Spray Foam
Based in Hartford, 7 mi away
55/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 4 Google reviews
- Hours
- Mon–Sun 6 AM–7 PM
- Address
- 65 Highland Park Dr, Bloomfield, CT 06002
Based in Hebron, 24 mi away
55/100CR ScoreRanked #13 because of its Google rating and review volume: 4.8★ from 521 Google reviews.
- 4.8★ from 521 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 29 Northridge Dr, North Windham, CT 06256
Based in Farmington, 11 mi away
55/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.4★ from 30 Google reviews, listed on Google as “Insulation contractor”.
- 4.4★ from 30 Google reviews
- Hours
- Mon–Sat 8 AM–6 PM · Sun closed
- Address
- 35 E Main St #359, Avon, CT 06001
Based in Farmington, 12 mi away
54/100CR ScoreRanked #15 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
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 507 Carlton Ln, Rocky Hill, CT 06067
Based in East Haddam, 22 mi away
54/100CR ScoreRanked #16 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
#17 Collins & Co
Based in Ellington, 7 mi away
54/100CR ScoreRanked #17 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 Cheshire Village, 15 mi away
54/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.2★ from 56 Google reviews, listed on Google as “Insulation contractor”.
- 4.2★ from 56 Google reviews
- Hours
- Mon–Fri 6 AM–5 PM · Sat 7 AM–12 PM · Sun closed
- Address
- 105A Clark Dr, East Berlin, CT 06023
#19 Energy Nerds LLC
Based in New Britain, 13 mi away
54/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Insulation contractor”.
- 4.7★ from 15 Google reviews
- Hours
- Mon–Sat 7 AM–6 PM · Sun closed
- Address
- Chapman St, New Britain, CT 06051
Based in Ellington, 9 mi away
53/100CR ScoreRanked #20 because of its Google rating and review volume: 4.7★ from 787 Google reviews, the most in South Windsor.
- 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
Based in Bethel, 21 mi away
53/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 25 Google reviews
- Hours
- Mon–Sat 7 AM–7 PM · Sun closed
Based in Cromwell, 13 mi away
53/100CR ScoreRanked #22 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 Cheshire, 25 mi away
52/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 13 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 60 Creamery Rd, Cheshire, CT 06410
Based in West Hartford, 8 mi away
52/100CR ScoreRanked #24 because of its Google rating and availability: 4.6★ from 22 Google reviews, open 24/7.
- 4.6★ from 22 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 71 Raymond Rd, West Hartford, CT 06107
Based in Westfield, 21 mi away
52/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.9★ from 45 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 45 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 54 Mainline Dr Unit C, Westfield, MA 01085
Insulation contractors ranked #26 to #50
#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 53 ranked insulation contractors here; the rest are on their profiles.
Also serving South Windsor
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 |
|---|---|---|
| Alex's Energy Insulation Construction LLC | 5.0★ (2) | 19 mi |
| B&E | 5.0★ (1) | 21 mi |
| Bright Solutions, LLC | 5.0★ (1) | 4 mi |
| Bright Solutions, LLC | 5.0★ (1) | 7 mi |
| Ceilings Inc. | 3.0★ (1) | 8 mi |
| Charette Drywall Systems LLC | 5.0★ (1) | 23 mi |
| CNC LLC Holyoke,Ma | 5.0★ (2) | 24 mi |
| Connecticut Spray Foam LLC | 1.0★ (1) | 8 mi |
| Connecticut's Handyman | 5.0★ (1) | 7 mi |
| Eman Home | 5 mi | |
| Fleming's Property Services LLC | 5.0★ (1) | 11 mi |
| Manchester | 5.0★ (1) | 9 mi |
| Mechanical Insulation By D&R | 5.0★ (1) | 22 mi |
| MK Dryer Vent Cleaning Services, CT | 5.0★ (5) | In South Windsor |
| NFA Dryer Vent Cleaning Services & Air Duct Cleaning Services South Windsor, CT | 5.0★ (2) | In South Windsor |
| Pro Insulation | 1.0★ (1) | 14 mi |
| R-Value Insulation LLC | 5.0★ (1) | 25 mi |
| Rigid Mason Contractors Inc | 5.0★ (1) | 5 mi |
| STP Dryer Vent Cleaning South Windsor, CT | 4.9★ (8) | In South Windsor |
| TC Daimyo House Restoration And Attic Insulation Services,Hartford, CT | 5.0★ (2) | 3 mi |
How much do insulation contractors cost in South Windsor?
National price ranges in USD, not adjusted for South Windsor. 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 South Windsor insulation contractors
We scored 53 South Windsor insulation contractors on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, 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 South Windsor data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
Insulation contractors in South Windsor: frequently asked questions
Who is the best insulation contractor in South Windsor?
By CR Score, the highest-ranked insulation contractor in South Windsor, CT is Eco Energy Guard LLC with a CR Score of 59/100. It has 5.0★ from 96 Google reviews. It is open 7 days a week. Precision (#2) and JT Energy LLC (#3) follow. We ranked 53 insulation contractors on ten factors, last updated October 22, 2026.
How many insulation contractors are there in South Windsor?
ContractorsRanked ranks 53 insulation contractors serving South Windsor, CT. 1 of them is based in South Windsor; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which insulation contractors in South Windsor are open 24/7?
4 ranked insulation contractors in South Windsor post 24/7 hours. The highest-ranked are Klaus Larsen Roofing (#13), Scalzo Mechanical Insulation, LLC (#15) and Graves Brothers Home Improvement (#24). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which insulation contractors in South Windsor work on weekends?
29 of 53 ranked insulation contractors post Saturday hours and 13 post Sunday hours. The highest-ranked open Saturdays are Eco Energy Guard LLC (#1), Precision (#2) and JT Energy LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in South Windsor?
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 South Windsor. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do South Windsor insulation contractors have?
The median Google rating among 53 rated insulation contractors in South Windsor is 4.8★, with a median of 18 reviews. Homestead Comfort has the most, 787 reviews, and ranks #20. 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 ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do insulation contractors outside South Windsor count in this ranking?
Yes, if they are within 25 mi of the South Windsor 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 South Windsor
- October 2026: CR Scores recalculated for 53 insulation contractors serving South Windsor.
More insulation contractors and South Windsor pages
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Other trades in South Windsor
- Roofers in South Windsor777 ranked
- Plumbers in South Windsor405 ranked
- Electricians in South Windsor390 ranked
- HVAC contractors in South Windsor485 ranked
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- Painters in South Windsor156 ranked
- Landscapers in South Windsor281 ranked
- Handymen in South Windsor47 ranked
- Kitchen remodelers in South Windsor284 ranked
- Bathroom remodelers in South Windsor294 ranked
- Flooring contractors in South Windsor214 ranked
- Tile installers in South Windsor45 ranked
- Drywall contractors in South Windsor12 ranked
- Concrete contractors in South Windsor132 ranked
- Fence contractors in South Windsor89 ranked
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- Siding contractors in South Windsor371 ranked
- Window installers in South Windsor313 ranked
- Gutter installers in South Windsor186 ranked
- Solar installers in South Windsor106 ranked
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- Tree services in South Windsor306 ranked
- Masonry contractors in South Windsor240 ranked
- Water damage restoration companies in South Windsor293 ranked
- Home builders in South Windsor220 ranked
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- All contractors in South Windsor