77 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Millbury: Energy Protectors, CR Score 61/100; 5.0★ from 330 Google reviews; open Sundays until 5 PM.
Best for emergencies (open 24/7): Northeast Home & Energy, posts 24/7 hours; ranked #2 of 77.
Most-reviewed: Endless Energy, 513 Google reviews at 4.7★, the most of 77 ranked; ranked #9.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
77 Millbury insulation contractors are ranked here by CR Score, from ten published factors. 6 are open 24/7, 41 open Saturdays and 7 open Sundays, based on posted hours. The median Google rating is 4.9★ across 77 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Energy Protectors | 61 | 5.0★ (330) | Spencer, 12 mi away | Sun | Overall |
| 2 | Northeast Home & Energy | 59 | 4.9★ (225) | Grafton, 4 mi away | 24/7 | Emergencies |
| 3 | Evergreen Insulation | 57 | 4.5★ (17) | Sutton, 2 mi away | Sat | — |
| 4 | AVID Energy Solutions | 57 | 5.0★ (20) | Sutton, 7 mi away | Sat | — |
| 5 | OnTime Insulation Services Inc. | 56 | 5.0★ (103) | Holliston, 15 mi away | — | — |
| 6 | Wattson Home Solutions | 56 | 4.3★ (110) | Worcester, 5 mi away | — | — |
| 7 | Custom Insulation Company, Inc. | 56 | 4.7★ (47) | Worcester, 5 mi away | — | — |
| 8 | Efficient Buildings LLC | 56 | 5.0★ (10) | Hudson, 16 mi away | 24/7 | — |
| 9 | Endless Energy | 56 | 4.7★ (513) | Marlborough, 12 mi away | Sat · Sun · Evenings | Most reviews |
| 10 | Thermal Seal Insulating Glass | 56 | 4.8★ (16) | Uxbridge, 13 mi away | Sat · Sun | — |
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 330 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Grafton, 4 mi away
Ranked #2 because of its Google rating and review volume: 4.9★ from 225 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sutton, 2 mi away
Ranked #3 because of its Google rating and trade focus: 4.5★ from 17 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sutton, 7 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Holliston, 15 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 103 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Worcester, 5 mi away
Ranked #6 because of its Google rating and trade focus: 4.3★ from 110 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Worcester, 5 mi away
Ranked #7 because of its Google rating and trade focus: 4.7★ from 47 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hudson, 16 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Marlborough, 12 mi away
Ranked #9 because of its Google rating and review volume: 4.7★ from 513 Google reviews, the most in Millbury.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Uxbridge, 13 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Blackstone, 15 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 92 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Spencer, 13 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 48 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Auburn, 6 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sutton, 2 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Woonsocket, 20 mi away
Ranked #15 because of its Google rating and trade focus: 4.6★ from 77 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Franklin, 21 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Worcester, 2 mi away
Ranked #17 because of its Google rating and trade focus: 3.3★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Charlton, 11 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 36 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Auburn, 7 mi away
Ranked #19 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 Holliston, 17 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 46 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Framingham, 18 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 54 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Woonsocket, 18 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Norfolk, 22 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Charlton, 10 mi away
Ranked #24 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 Framingham, 18 mi away
Ranked #25 because of its Google rating and review volume: 5.0★ from 291 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Millbury. 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 77 Millbury 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 Millbury 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 |