25 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Gardner: Premier Insulation, CR Score 86/100; 4.8★ from 26 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Efficient Buildings LLC, posts 24/7 hours; ranked #3 of 25.
Most-reviewed: Energy Protectors, 330 Google reviews at 5.0★, the most of 25 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
25 Gardner insulation contractors are ranked here by CR Score, from 8 published factors. 1 is open 24/7, 13 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.9★ across 25 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Premier Insulation | 86 | 4.8★ (26) | Gardner | Sat · Sun · Evenings | Overall |
| 2 | Energy Protectors | 84 | 5.0★ (330) | Spencer, 22 mi away | Sun | Most reviews |
| 3 | Efficient Buildings LLC | 82 | 5.0★ (10) | Hudson, 24 mi away | 24/7 | Emergencies |
| 4 | Thermal Dynamics Inc. | 76 | 5.0★ (7) | Monson, 16 mi away | Sat | — |
| 5 | All In One & Moore | 76 | 3.4★ (15) | West Boylston, 19 mi away | — | — |
| 6 | Extreme Spray Foam of Springfield | 76 | 5.0★ (14) | Enfield, 10 mi away | — | — |
| 7 | A Plus Energy Services | 75 | 4.8★ (59) | Milford, 23 mi away | — | — |
| 8 | Green Idea Insulation Corp | 74 | 4.7★ (14) | Auburn, 23 mi away | Sat | — |
| 9 | Custom Insulation Company, Inc. | 73 | 4.7★ (47) | Worcester, 25 mi away | — | — |
| 10 | Peritus Spray Foam Insulation | 73 | 4.7★ (7) | Leominster, 13 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 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 Spencer, 22 mi away
Ranked #2 because of its Google rating and review volume: 5.0★ from 330 Google reviews, the most Google reviews on this list (330).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hudson, 24 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 Monson, 16 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in West Boylston, 19 mi away
Ranked #5 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 Enfield, 10 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Milford, 23 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 59 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Auburn, 23 mi away
Ranked #8 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 Worcester, 25 mi away
Ranked #9 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 Leominster, 13 mi away
Ranked #10 because of its Google rating and trade focus: 4.7★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Worcester, 24 mi away
Ranked #11 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 Auburn, 24 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Worcester, 21 mi away
Ranked #13 because of its Google rating and review volume: 4.9★ from 181 Google reviews, 181 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Leominster, 13 mi away
Ranked #14 because of its Google rating and trade focus: 3.7★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Douglas, 23 mi away
Ranked #15 because of its Google rating and review volume: 5.0★ from 27 Google reviews, 27 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Worcester, 24 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 18 Google reviews, listed on Google as “Roofing contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Leominster, 14 mi away
Ranked #17 because of its Google rating and trade focus: 4.3★ from 7 Google reviews, listed on Google as “Contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Leominster, 14 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spencer, 20 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spencer, 23 mi away
Ranked #20 because of its Google rating and review volume: 4.7★ from 22 Google reviews, 22 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Leominster, 12 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Window installation service”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ashburnham, 14 mi away
Ranked #22 because of its Google rating and trade focus: 1.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Auburn, 23 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 4 Google reviews, open Saturdays until 7 PM.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Holden, 11 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Painter”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Leominster, 14 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Stucco contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
10 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 | 22 mi | |
| Done & Done Insulation, LLC | 15 mi | |
| EcoMax Insulation | 5.0★ (2) | 24 mi |
| Energy Insulation Conservation | 24 mi | |
| Energy Saver Enablers, LLC | 5.0★ (1) | 16 mi |
| Foam Monsters | 5.0★ (1) | 23 mi |
| Graphite Insulating System Inc | 5.0★ (1) | In Gardner |
| Hot & Cold Energy | 1.0★ (1) | 13 mi |
| Michael J. Pupa Licensed Electrician Inc. | 4.8★ (104) | In Gardner |
| Sullivan Environmental Services | 5.0★ (1) | 22 mi |
National price ranges in USD, not adjusted for Gardner. 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 25 Gardner 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 Gardner 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 |