39 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Westminster: Energy Protectors, CR Score 59/100; 5.0★ from 330 Google reviews; open Sundays until 5 PM.
Best for emergencies (open 24/7): Efficient Buildings LLC, posts 24/7 hours; ranked #3 of 39.
Most-reviewed: Endless Energy, 513 Google reviews at 4.7★, the most of 39 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
39 Westminster insulation contractors are ranked here by CR Score, from ten published factors. 2 are open 24/7, 19 open Saturdays and 5 open Sundays, based on posted hours. The median Google rating is 4.8★ across 39 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Energy Protectors | 59 | 5.0★ (330) | Spencer, 20 mi away | Sun | Overall |
| 2 | Premier Insulation | 59 | 4.8★ (26) | Gardner, 4 mi away | Sat · Sun · Evenings | — |
| 3 | Efficient Buildings LLC | 55 | 5.0★ (10) | Hudson, 19 mi away | 24/7 | Emergencies |
| 4 | Dolphin Insulation, Inc. | 54 | 4.8★ (159) | Acton, 22 mi away | — | — |
| 5 | Northeast Home & Energy | 54 | 4.9★ (225) | Grafton, 24 mi away | 24/7 | — |
| 6 | Freedom Insulation | 54 | 4.9★ (40) | Billerica, 24 mi away | Sat · Evenings | — |
| 7 | Endless Energy | 53 | 4.7★ (513) | Marlborough, 23 mi away | Sat · Sun · Evenings | Most reviews |
| 8 | Extreme Spray Foam of Springfield | 53 | 5.0★ (14) | Enfield, 9 mi away | — | — |
| 9 | A Plus Energy Services | 52 | 4.8★ (59) | Milford, 23 mi away | — | — |
| 10 | Lamothe Insulation | 52 | 5.0★ (48) | Spencer, 25 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 330 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Gardner, 4 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 26 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hudson, 19 mi away
Ranked #3 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 Acton, 22 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 159 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Grafton, 24 mi away
Ranked #5 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 Billerica, 24 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 40 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Marlborough, 23 mi away
Ranked #7 because of its Google rating and review volume: 4.7★ from 513 Google reviews, the most in Westminster.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Enfield, 9 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milford, 23 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 59 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Spencer, 25 mi away
Ranked #10 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 Framingham, 25 mi away
Ranked #11 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 Monson, 16 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Leominster, 8 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Worcester, 21 mi away
Ranked #14 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 Auburn, 19 mi away
Ranked #15 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 Worcester, 21 mi away
Ranked #16 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 West Boylston, 15 mi away
Ranked #17 because of its Google rating and trade focus: 3.4★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Leominster, 8 mi away
Ranked #18 because of its Google rating and trade focus: 3.7★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Auburn, 21 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 Worcester, 17 mi away
Ranked #20 because of its Google rating and review volume: 4.9★ from 181 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Marlborough, 24 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 Leominster, 9 mi away
Ranked #22 because of its Google rating and trade focus: 4.3★ from 7 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Worcester, 20 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 18 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Worcester, 23 mi away
Ranked #24 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 Leominster, 9 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #39, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Energy Allstars | 49 | 3.3★ (4) | 23 mi |
| 27 | Boston Insulation Corp | 48 | 1.0★ (3) | 10 mi |
| 28 | Alex Painting & Carpentry | 48 | 5.0★ (27) | 19 mi |
| 29 | Handy Lou's Home Improvement Services | 47 | 5.0★ (4) | 7 mi |
| 30 | CGC Attic Insulation & Roofing Services MA, | 47 | 5.0★ (4) | 19 mi |
| 31 | Marlboro Attic Insulation & Roofing Service Marlborough, MA | 46 | 4.8★ (8) | 24 mi |
| 32 | Imperial Worldwide | 46 | 3.3★ (3) | 23 mi |
| 33 | CUIL Services | 46 | 4.7★ (22) | 22 mi |
| 34 | ZND-BAKI Attic-Solution & Insulation's & Roofing Service Acton, MA | 46 | 4.3★ (24) | 25 mi |
| 35 | Princeton Painting | 45 | 5.0★ (5) | 7 mi |
| 36 | Zelayas Construction Inc. | 45 | 5.0★ (4) | 9 mi |
| 37 | LCP'S Attic Insulation & Roofing Services Inc, MA | 45 | 3.7★ (3) | 23 mi |
| 38 | SUUD Attic Insulation & Dryer Vent Cleaning Service Hudson, MA | 44 | 5.0★ (4) | 22 mi |
| 39 | Sanchez’s Painting | 44 | 5.0★ (4) | 19 mi |
11 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 |
|---|---|---|
| Advance Construction and Restoration | 19 mi | |
| Done & Done Insulation, LLC | 13 mi | |
| Done Right HVAC | 25 mi | |
| EcoMax Insulation | 5.0★ (2) | 21 mi |
| Energy Insulation Conservation | 21 mi | |
| Energy Saver Enablers, LLC | 5.0★ (1) | 19 mi |
| Foam Monsters | 5.0★ (1) | 19 mi |
| Graphite Insulating System Inc | 5.0★ (1) | 2 mi |
| HomeWorks Energy | 1.0★ (2) | 23 mi |
| Hot & Cold Energy | 1.0★ (1) | 8 mi |
| Sullivan Environmental Services | 5.0★ (1) | 17 mi |
National price ranges in USD, not adjusted for Westminster. 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 39 Westminster 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 Westminster 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 |