62/100CR Score
Ranked #1 because of its Google rating and review volume: 5.0★ from 611 Google reviews, the most in New London.
- 5.0★ from 611 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat–Sun closed
- Address
- 16 Deer Trail, Montville, CT 06370
Best Insulation Contractors in New London, CT (2026)
14 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in New London: Anchor Home Inspection, CR Score 62/100; 5.0★ from 611 Google reviews; open evenings.
- 11
Best for emergencies (open 24/7): RoofMasters, posts 24/7 hours; ranked #11 of 14.
- 12
Most-reviewed: Ace Handyman Services Hartford and New London Counties, 82 Google reviews at 4.7★, the most of 14 ranked after Anchor Home Inspection; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
14 New London insulation contractors are ranked here by CR Score, from ten published factors. 1 is open 24/7, 5 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.7★ across 14 rated businesses.
Top 10 insulation contractors in New London at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Anchor Home Inspection | 62 | 5.0★ (611) | East Haddam, 8 mi away | Evenings | Overall |
| 2 | Best Home Performance | 55 | 4.6★ (43) | East Haddam, 20 mi away | Sat · Sun | — |
| 3 | Nealon Insulation of Connecticut | 54 | 5.0★ (66) | Guilford, 21 mi away | — | — |
| 4 | Nescor | 53 | 4.0★ (4) | Old Saybrook, 16 mi away | Sat · Sun · Evenings | — |
| 5 | A/Z Corporation | 52 | 4.5★ (11) | Groton, 13 mi away | — | — |
| 6 | C & R Insulation Inc | 51 | 4.6★ (18) | Hebron, 20 mi away | — | — |
| 7 | Quality Insulation of Eastern CT | 51 | 3.7★ (26) | Norwich, 15 mi away | — | — |
| 8 | Anchor Insulation | 51 | 4.3★ (9) | Norwich, 15 mi away | — | — |
| 9 | John Wills Painting & Power Washing Co., LLC | 49 | 4.9★ (53) | East Haddam, 20 mi away | Sat · Evenings | — |
| 10 | General Mechanical Insulation LLC | 49 | 5.0★ (3) | East Haddam, 18 mi away | — | — |
The 14 best insulation contractors in New London, 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.
Based in East Haddam, 20 mi away
55/100CR 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 Guilford, 21 mi away
54/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 66 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 66 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 9 Robin Ln, Clinton, CT 06413
#4 Nescor
Based in Old Saybrook, 16 mi away
53/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
- 4.0★ from 4 Google reviews
- Hours
- Mon–Thu 8 AM–9 PM · Fri 8 AM–7 PM · Sat 8 AM–4 PM · Sun 9 AM–3 PM
- Address
- 1271 Boston Post Rd, Old Saybrook, CT 06475
Based in Groton, 13 mi away
52/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.5★ from 11 Google reviews, listed on Google as “Insulation contractor”.
- 4.5★ from 11 Google reviews
- Hours
- Mon–Fri 7 AM–5 PM · Sat–Sun closed
- Address
- 46 Norwich-Westerly Rd, North Stonington, CT 06359
Based in Hebron, 20 mi away
51/100CR ScoreRanked #6 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
Based in Norwich, 15 mi away
51/100CR ScoreRanked #7 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 Norwich, 15 mi away
51/100CR ScoreRanked #8 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 East Haddam, 20 mi away
49/100CR ScoreRanked #9 because of its Google rating and review volume: 4.9★ from 53 Google reviews.
- 4.9★ from 53 Google reviews
- Hours
- Mon–Sat 8 AM–8 PM · Sun closed
Based in East Haddam, 18 mi away
49/100CR ScoreRanked #10 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
#11 RoofMasters
Based in Norwich, 18 mi away
48/100CR ScoreRanked #11 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 East Haddam, 19 mi away
47/100CR ScoreRanked #12 because of its Google rating and review volume: 4.7★ from 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
Based in Groton, 10 mi away
47/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.6★ from 16 Google reviews, listed on Google as “Construction company”.
- 4.6★ from 16 Google reviews
- Hours
- Mon–Fri 8 AM–4:30 PM · Sat–Sun closed
- Address
- 46 Taugwonk Spur Rd #5, Stonington, CT 06378
#14 Flag Services
Based in Bridgeport, 23 mi away
46/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 12 Google reviews
- Hours
- Mon–Fri 7 AM–6 PM · Sat 7 AM–1 PM · Sun closed
Also serving New London
12 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) | 24 mi |
| ASW Construction | 24 mi | |
| Capalbo's Waste Service | 17 mi | |
| Eastern CT Property Services | In New London | |
| Foam Dispensing Solutions | 23 mi | |
| Green Energy Insulation & Chimney Caps and Covers ltd | 20 mi | |
| Mega Innovations LLC | 23 mi | |
| Mom and Pop Plumbing & Drain Service LLC | 5.0★ (38) | In New London |
| R & R Insulators LLC | 18 mi | |
| R-Value Insulation LLC | 5.0★ (1) | 19 mi |
| R-Value Insulation LLC | 11 mi | |
| The Superior Group - Roofing Company | 4.9★ (17) | In New London |
How much do insulation contractors cost in New London?
National price ranges in USD, not adjusted for New London. 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 New London insulation contractors
We scored 14 New London 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 New London 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 New London: frequently asked questions
Who is the best insulation contractor in New London?
By CR Score, the highest-ranked insulation contractor in New London, CT is Anchor Home Inspection with a CR Score of 62/100. It has 5.0★ from 611 Google reviews. It is open evenings. Best Home Performance (#2) and Nealon Insulation of Connecticut (#3) follow. We ranked 14 insulation contractors on ten factors, last updated October 22, 2026.
How many insulation contractors are there in New London?
ContractorsRanked ranks 14 insulation contractors serving New London, CT. Another 12 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which insulation contractors in New London are open 24/7?
1 ranked insulation contractor in New London posts 24/7 hours. The highest-ranked is RoofMasters (#11). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which insulation contractors in New London work on weekends?
5 of 14 ranked insulation contractors post Saturday hours and 3 post Sunday hours. The highest-ranked open Saturdays are Best Home Performance (#2), Nescor (#4) and John Wills Painting & Power Washing Co., LLC (#9). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in New London?
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 New London. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do New London insulation contractors have?
The median Google rating among 14 rated insulation contractors in New London is 4.7★, with a median of 17 reviews. Anchor Home Inspection has the most, 611 reviews, and ranks #1. 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 New London count in this ranking?
Yes, if they are within 25 mi of the New London 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 New London
- October 2026: CR Scores recalculated for 14 insulation contractors serving New London.
More insulation contractors and New London pages
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Other trades in New London
- Roofers in New London458 ranked
- Plumbers in New London136 ranked
- Electricians in New London101 ranked
- HVAC contractors in New London131 ranked
- General contractors in New London130 ranked
- Painters in New London42 ranked
- Landscapers in New London82 ranked
- Handymen in New London22 ranked
- Kitchen remodelers in New London74 ranked
- Bathroom remodelers in New London70 ranked
- Flooring contractors in New London48 ranked
- Tile installers in New London10 ranked
- Concrete contractors in New London41 ranked
- Fence contractors in New London26 ranked
- Deck builders in New London48 ranked
- Siding contractors in New London234 ranked
- Window installers in New London188 ranked
- Gutter installers in New London44 ranked
- Solar installers in New London65 ranked
- Garage door repair companies in New London16 ranked
- Foundation repair companies in New London56 ranked
- Tree services in New London111 ranked
- Masonry contractors in New London71 ranked
- Water damage restoration companies in New London197 ranked
- Home builders in New London181 ranked
- Demolition contractors in New London15 ranked
- All contractors in New London