49 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Spencer: Energy Protectors, CR Score 64/100; 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 #3 of 49.
Most-reviewed: Endless Energy, 513 Google reviews at 4.7★, the most of 49 ranked; ranked #12.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
49 Spencer insulation contractors are ranked here by CR Score, from ten published factors. 2 are open 24/7, 25 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 4.9★ across 49 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Energy Protectors | 64 | 5.0★ (330) | Spencer | Sun | Overall |
| 2 | Lamothe Insulation | 58 | 5.0★ (48) | Spencer | — | — |
| 3 | Northeast Home & Energy | 57 | 4.9★ (225) | Grafton, 15 mi away | 24/7 | Emergencies |
| 4 | Sure Seal | 56 | 4.8★ (36) | Charlton, 5 mi away | — | — |
| 5 | Custom Insulation Company, Inc. | 55 | 4.7★ (47) | Worcester, 8 mi away | — | — |
| 6 | Wattson Home Solutions | 55 | 4.3★ (110) | Worcester, 10 mi away | — | — |
| 7 | Premier Insulation | 55 | 4.8★ (26) | Gardner, 22 mi away | Sat · Sun · Evenings | — |
| 8 | Efficient Buildings LLC | 54 | 5.0★ (10) | Hudson, 23 mi away | 24/7 | — |
| 9 | Green Idea Insulation Corp | 54 | 4.7★ (14) | Auburn, 10 mi away | Sat | — |
| 10 | Ecomax Spray Foam | 54 | 5.0★ (6) | Auburn, 6 mi away | Sat | — |
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 Spencer
Ranked #2 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 Grafton, 15 mi away
Ranked #3 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 Charlton, 5 mi away
Ranked #4 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 Worcester, 8 mi away
Ranked #5 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 Worcester, 10 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 Gardner, 22 mi away
Ranked #7 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, 23 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 Auburn, 10 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 8 of 10 factors; credentials and recency not yet collected.
Based in Auburn, 6 mi away
Ranked #10 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 Charlton, 10 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 Marlborough, 21 mi away
Ranked #12 because of its Google rating and review volume: 4.7★ from 513 Google reviews, the most in Spencer.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sutton, 18 mi away
Ranked #13 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 Sutton, 14 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 8 of 10 factors; credentials and recency not yet collected.
Based in Monson, 11 mi away
Ranked #15 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 Blackstone, 24 mi away
Ranked #16 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 Uxbridge, 24 mi away
Ranked #17 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 Enfield, 13 mi away
Ranked #18 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 West Boylston, 13 mi away
Ranked #19 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 Worcester, 11 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 Worcester, 12 mi away
Ranked #21 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 Worcester, 10 mi away
Ranked #22 because of its Google rating and trade focus: 3.3★ 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 Spencer
Ranked #23 because of its Google rating and review volume: 4.7★ from 22 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sutton, 14 mi away
Ranked #24 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 Worcester, 10 mi away
Ranked #25 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.
#1 to #25 are shown in full above. Here are #26 to #49, in CR Score order; each links to its profile.
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 |
|---|---|---|
| Advance Construction and Restoration | 11 mi | |
| AirSealing America, LLC | 21 mi | |
| Blue Ribbon Painting | 16 mi | |
| Done & Done Insulation, LLC | 10 mi | |
| EcoMax Insulation | 5.0★ (2) | 6 mi |
| Energy Insulation Conservation | 8 mi | |
| Fontaine Enterprises | 11 mi | |
| Graphite Insulating System Inc | 5.0★ (1) | 22 mi |
| H J Houle & Son | 23 mi | |
| Hot & Cold Energy | 1.0★ (1) | 22 mi |
| I&W Insulation | 1.0★ (2) | 20 mi |
| Lantern Energy | 20 mi | |
| MAK Insulation | 1.0★ (2) | 21 mi |
| Mass Spray Foam Inc | 5.0★ (2) | 21 mi |
| Rational Business Solutions | 21 mi | |
| Spray Foam Insulation Boston Mass & Rhode Island | 5.0★ (1) | 24 mi |
| Sullivan Environmental Services | 5.0★ (1) | 19 mi |
| Tetreault Construction | 5.0★ (2) | In Spencer |
| thermospray insulation | 21 mi | |
| Tier One Insulation Services LLC | 5.0★ (1) | 21 mi |
National price ranges in USD, not adjusted for Spencer. 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 49 Spencer 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 Spencer 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 |