74 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Oakville: Eco Energy Guard LLC, CR Score 57/100; 5.0★ from 96 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Scalzo Mechanical Insulation, LLC, posts 24/7 hours; ranked #20 of 74.
Most-reviewed: Connecticut Basement Systems, 1,655 Google reviews at 4.8★, the most of 74 ranked; ranked #19.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
74 Oakville insulation contractors are ranked here by CR Score, from ten published factors. 5 are open 24/7, 41 open Saturdays and 12 open Sundays, based on posted hours. The median Google rating is 4.8★ across 74 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Eco Energy Guard LLC | 57 | 5.0★ (96) | Farmington, 17 mi away | Sat · Sun · Evenings | Overall |
| 2 | Ace Handyman Services Northwestern CT | 56 | 4.9★ (119) | Woodbury, 8 mi away | — | — |
| 3 | Harisi Energy LLC | 55 | 4.8★ (40) | Oakville | — | — |
| 4 | A&L Spray Foam Bloomfield | 55 | 5.0★ (25) | Bethel, 8 mi away | Sat · Evenings | — |
| 5 | Aj Insulation LLC | 55 | 5.0★ (24) | Torrington, 15 mi away | Sat · Sun · Evenings | — |
| 6 | CT Spray Foam Insulation LLC | 55 | 5.0★ (13) | Cheshire, 11 mi away | Sat · Sun · Evenings | — |
| 7 | New England Performance Insulation | 54 | 5.0★ (153) | Milford, 25 mi away | Sat | — |
| 8 | Right Way Insulation | 54 | 5.0★ (33) | Darien, 14 mi away | Sat | — |
| 9 | USA Insulation of Connecticut | 54 | 4.7★ (58) | Bethel, 16 mi away | Sat | — |
| 10 | Koala Insulation of Southern Connecticut | 53 | 5.0★ (113) | Shelton, 19 mi away | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 96 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Woodbury, 8 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 119 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oakville
Ranked #3 because of its Google rating and trade focus: 4.8★ from 40 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 8 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Torrington, 15 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cheshire, 11 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milford, 25 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 153 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darien, 14 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 16 mi away
Ranked #9 because of its Google rating and trade focus: 4.7★ from 58 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Shelton, 19 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 113 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Torrington, 16 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cromwell, 24 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 158 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 14 mi away
Ranked #13 because of its Google rating and trade focus: 3.7★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cheshire, 18 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 20 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Haven, 22 mi away
Ranked #16 because of its Google rating and trade focus: 4.5★ from 97 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 11 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 30 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 23 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Seymour, 14 mi away
Ranked #19 because of its Google rating and review volume: 4.8★ from 1,655 Google reviews, the most in Oakville.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Farmington, 21 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 8 of 10 factors; credentials and recency not yet collected.
Based in Bristol, 18 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 17 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 on 8 of 10 factors; credentials and recency not yet collected.
Based in Wallingford, 17 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darien, 24 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wallingford, 16 mi away
Ranked #25 because of its Google rating and trade focus: 4.3★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
National price ranges in USD, not adjusted for Oakville. 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 74 Oakville 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 Oakville 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 |