65 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Derby: New England Performance Insulation, CR Score 59/100; 5.0★ from 153 Google reviews; open Saturdays until 4 PM.
Best for emergencies (open 24/7): PNC Spray Foam Insulation in Fairfield County, posts 24/7 hours; ranked #8 of 65.
Most-reviewed: Power Home Remodeling, 3,018 Google reviews at 4.6★, the most of 65 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
65 Derby insulation contractors are ranked here by CR Score, from ten published factors. 4 are open 24/7, 39 open Saturdays and 13 open Sundays, based on posted hours. The median Google rating is 4.9★ across 65 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | New England Performance Insulation | 59 | 5.0★ (153) | Milford, 7 mi away | Sat | Overall |
| 2 | Koala Insulation of Southern Connecticut | 58 | 5.0★ (113) | Shelton, 1 mi away | — | — |
| 3 | Ortiz Spray Foam Insulation, LLC | 56 | 5.0★ (32) | Bethel, 5 mi away | Sat | — |
| 4 | Advanced Insulation Milford | 56 | 5.0★ (39) | Milford, 8 mi away | Sat | — |
| 5 | Baybrook Remodelers Inc | 56 | 4.5★ (97) | West Haven, 6 mi away | Sat | — |
| 6 | Power Home Remodeling | 55 | 4.6★ (3,018) | Trumbull, 6 mi away | Sat · Evenings | Most reviews |
| 7 | OnTime Insulation | 55 | 5.0★ (20) | West Haven, 8 mi away | Sat · Evenings | — |
| 8 | PNC Spray Foam Insulation in Fairfield County | 55 | 5.0★ (4) | Bridgeport, 10 mi away | 24/7 | Emergencies |
| 9 | AMP'd Enterprises LLC | 55 | 4.9★ (78) | Branford, 17 mi away | Sat · Evenings | — |
| 10 | Element Shield LLC | 55 | 5.0★ (21) | Cheshire, 9 mi away | Sat | — |
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.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 153 Google reviews, listed on Google as “Insulation contractor”.
Based in Shelton, 1 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 113 Google reviews, listed on Google as “Insulation contractor”.
Based in Bethel, 5 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Insulation contractor”.
Based in Milford, 8 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Insulation contractor”.
Based in West Haven, 6 mi away
Ranked #5 because of its Google rating and trade focus: 4.5★ from 97 Google reviews, listed on Google as “Insulation contractor”.
Based in Trumbull, 6 mi away
Ranked #6 because of its Google rating and review volume: 4.6★ from 3,018 Google reviews, the most in Derby.
Based in West Haven, 8 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based in Bridgeport, 10 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based in Branford, 17 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 78 Google reviews, listed on Google as “Insulation contractor”.
Based in Cheshire, 9 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Insulation contractor”.
Based in Trumbull, 8 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based in Bethel, 12 mi away
Ranked #12 because of its Google rating and trade focus: 4.7★ from 58 Google reviews, listed on Google as “Insulation contractor”.
Based in Stratford, 11 mi away
Ranked #13 because of its Google rating and review volume: 4.9★ from 1,222 Google reviews.
Based in Stratford, 9 mi away
Ranked #14 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based in Darien, 14 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based in Darien, 14 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based in Seymour, 5 mi away
Ranked #17 because of its Google rating and review volume: 4.8★ from 1,655 Google reviews.
Based in Woodbury, 16 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 119 Google reviews, listed on Google as “Insulation contractor”.
Based in Bridgeport, 11 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based in Norwalk, 23 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based in Cheshire, 18 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based in Bethel, 12 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 41 Google reviews, listed on Google as “Insulation contractor”.
Based in Bethel, 14 mi away
Ranked #23 because of its Google rating and trade focus: 3.7★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based in Darien, 14 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based in Fairfield, 13 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 48 Google reviews, listed on Google as “Insulation contractor”.
#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 65 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 |
|---|---|---|
| A&C Insulation | 5.0★ (1) | 5 mi |
| AC Everest Insulation LLC | 5.0★ (1) | 7 mi |
| American Insulation | 5.0★ (1) | 7 mi |
| Attic Systems | 5.0★ (2) | 5 mi |
| Comfort Zone Heating & Air Conditioning | 4.0★ (2) | 6 mi |
| D & N Insulation Co Inc | 5.0★ (1) | 6 mi |
| DCT Heat & Frost Pipe Insulation Services | In Derby | |
| Energy Resources | 5.0★ (2) | 23 mi |
| Everest Insulation | 5.0★ (1) | 11 mi |
| G&G Contractor LLC | 5.0★ (2) | 20 mi |
| Griffin Insulation | 5.0★ (2) | 8 mi |
| KMK Insulation | 5.0★ (1) | 9 mi |
| Mavericks Foam and Coatings | 5.0★ (1) | 11 mi |
| Northeast Spray Foam, LLC | 5.0★ (2) | 23 mi |
| Perfection and Advance Drywall LLC - Drywall Installation Contractor, Drywall Covering Service, Metal Framing | 5.0★ (2) | 8 mi |
| Professional Cleaning & Restoration Systems of Connecticut | 4.9★ (70) | In Derby |
| RTPW Painting Decor And Dry Wall Services And Attic Insulation In Stratford, PA | 5.0★ (1) | 8 mi |
| Sprayshield Fireproofing & Spray Foam | 5.0★ (1) | 5 mi |
| SUPREME INTERIOR & EXTERIOR PAINTING | 5.0★ (2) | 5 mi |
| Temp Chek Services, LLC | 5.0★ (2) | 7 mi |
National price ranges in USD, not adjusted for Derby. 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 65 Derby 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 Derby 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 |