76 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Hamilton Worcester: Northeast Home & Energy, CR Score 87/100; 4.9★ from 225 Google reviews; open 24/7.
Best for emergencies (open 24/7): Efficient Buildings LLC, posts 24/7 hours; ranked #3 of 76.
Most-reviewed: Endless Energy, 513 Google reviews at 4.7★, the most of 76 ranked; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
76 Hamilton Worcester insulation contractors are ranked here by CR Score, from 8 published factors. 5 are open 24/7, 40 open Saturdays and 7 open Sundays, based on posted hours. The median Google rating is 4.9★ across 76 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Northeast Home & Energy | 87 | 4.9★ (225) | Grafton, 4 mi away | 24/7 | Overall |
| 2 | Energy Protectors | 86 | 5.0★ (330) | Spencer, 11 mi away | Sun | — |
| 3 | Efficient Buildings LLC | 84 | 5.0★ (10) | Hudson, 13 mi away | 24/7 | Emergencies |
| 4 | Endless Energy | 82 | 4.7★ (513) | Marlborough, 10 mi away | Sat · Sun · Evenings | Most reviews |
| 5 | Accelerate Energy | 80 | 3.3★ (6) | Worcester, 2 mi away | — | — |
| 6 | Thermal Seal Insulating Glass | 80 | 4.8★ (16) | Uxbridge, 17 mi away | Sat · Sun | — |
| 7 | Progress Insulation | 80 | 4.8★ (4) | Sutton, 6 mi away | — | — |
| 8 | Premier Insulation | 80 | 4.8★ (26) | Gardner, 24 mi away | Sat · Sun · Evenings | — |
| 9 | Green Idea Insulation Corp | 80 | 4.7★ (14) | Auburn, 2 mi away | Sat | — |
| 10 | Newbury Insulation LLC. | 79 | 5.0★ (20) | Woonsocket, 22 mi away | — | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and availability: 4.9★ from 225 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spencer, 11 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 330 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hudson, 13 mi away
Ranked #3 because of its Google rating and availability: 5.0★ from 10 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Marlborough, 10 mi away
Ranked #4 because of its Google rating and review volume: 4.7★ from 513 Google reviews, the most Google reviews on this list (513).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Worcester, 2 mi away
Ranked #5 because of its Google rating and trade focus: 3.3★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Uxbridge, 17 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sutton, 6 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Gardner, 24 mi away
Ranked #8 because of its Google rating and trade focus: 4.8★ from 26 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Auburn, 2 mi away
Ranked #9 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Woonsocket, 22 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Sutton, 6 mi away
Ranked #11 because of its Google rating and trade focus: 4.5★ from 17 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sutton, 11 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in West Boylston, 6 mi away
Ranked #13 because of its Google rating and trade focus: 3.4★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Framingham, 18 mi away
Ranked #14 because of its Google rating and trade focus: 4.5★ from 17 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Worcester, 2 mi away
Ranked #15 because of its Google rating and trade focus: 3.3★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Franklin, 23 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 6 of 8 factors; credentials and recency not yet collected.
Based in Worcester, 3 mi away
Ranked #17 because of its Google rating and trade focus: 4.7★ from 47 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Holliston, 16 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 103 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Natick, 21 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 32 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Worcester, 2 mi away
Ranked #20 because of its Google rating and trade focus: 4.3★ from 110 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Norfolk, 24 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Woonsocket, 23 mi away
Ranked #22 because of its Google rating and availability: 4.0★ from 3 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spencer, 13 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 48 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Billerica, 21 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 40 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Woonsocket, 23 mi away
Ranked #25 because of its Google rating and trade focus: 4.6★ from 77 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Hamilton Worcester. 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 76 Hamilton Worcester insulation contractors on 8 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. Unknown factors are left out of the score, 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 Hamilton Worcester data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |