102 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Northborough: Efficient Buildings LLC, CR Score 85/100; 5.0★ from 10 Google reviews; open 24/7.
Best for emergencies (open 24/7): Northeast Home & Energy, posts 24/7 hours; ranked #2 of 102.
Most-reviewed: Power Home Remodeling, 4,159 Google reviews at 4.7★, the most of 102 ranked; ranked #22.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
102 Northborough insulation contractors are ranked here by CR Score, from 8 published factors. 7 are open 24/7, 52 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.9★ across 102 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Efficient Buildings LLC | 85 | 5.0★ (10) | Hudson, 6 mi away | 24/7 | Overall |
| 2 | Northeast Home & Energy | 83 | 4.9★ (225) | Grafton, 7 mi away | 24/7 | Emergencies |
| 3 | Energy Protectors | 81 | 5.0★ (330) | Spencer, 18 mi away | Sun | — |
| 4 | Endless Energy | 81 | 4.7★ (513) | Marlborough, 3 mi away | Sat · Sun · Evenings | — |
| 5 | Eco Spray Foam Insulation | 78 | 4.5★ (17) | Framingham, 12 mi away | — | — |
| 6 | AirSealing America, LLC | 78 | 5.0★ (11) | West Concord, 18 mi away | Sat · Sun | — |
| 7 | Thermal Seal Insulating Glass | 78 | 4.8★ (16) | Uxbridge, 20 mi away | Sat · Sun | — |
| 8 | Premier Insulation | 77 | 4.8★ (26) | Gardner, 24 mi away | Sat · Sun · Evenings | — |
| 9 | Natick Advanced Insulation Services | 77 | 4.9★ (32) | Natick, 15 mi away | Sat · Evenings | — |
| 10 | Colt Home Services | 77 | 5.0★ (278) | Waltham, 21 mi away | Evenings | — |
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: 5.0★ from 10 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Grafton, 7 mi away
Ranked #2 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, 18 mi away
Ranked #3 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 Marlborough, 3 mi away
Ranked #4 because of its Google rating and availability: 4.7★ from 513 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Framingham, 12 mi away
Ranked #5 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 West Concord, 18 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Uxbridge, 20 mi away
Ranked #7 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 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 Natick, 15 mi away
Ranked #9 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 Waltham, 21 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 278 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Billerica, 13 mi away
Ranked #11 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 West Boylston, 8 mi away
Ranked #12 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 Woonsocket, 22 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 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Framingham, 13 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sutton, 12 mi away
Ranked #15 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 Worcester, 9 mi away
Ranked #16 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 Marlborough, 6 mi away
Ranked #17 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 Franklin, 22 mi away
Ranked #18 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 Holliston, 13 mi away
Ranked #19 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 Norfolk, 20 mi away
Ranked #20 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 Sutton, 16 mi away
Ranked #21 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 Waltham, 19 mi away
Ranked #22 because of its Google rating and review volume: 4.7★ from 4,159 Google reviews, the most Google reviews on this list (4,159).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Framingham, 8 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 54 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Woonsocket, 24 mi away
Ranked #24 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 Sutton, 12 mi away
Ranked #25 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.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 102 ranked insulation contractors here; the rest are on their profiles.
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 |
|---|---|---|
| Bay State Insulation | 5.0★ (2) | 14 mi |
| Brothers Painting | 5.0★ (2) | 12 mi |
| DENG'S Attic Insulation & Roofing Services Inc, MA | 1.0★ (2) | 22 mi |
| EcoMax Insulation | 5.0★ (2) | 13 mi |
| FRIG Attic Insulation & Roofing Services Framingham, MA | 5.0★ (1) | 12 mi |
| Greenstar Spray foam | 5.0★ (2) | 13 mi |
| HomeWorks Energy | 1.0★ (2) | 9 mi |
| I&W Insulation | 1.0★ (2) | 14 mi |
| Jan Carpentry Inc | 5.0★ (1) | 14 mi |
| MAK Insulation | 1.0★ (2) | 20 mi |
| Mass Spray Foam Inc | 5.0★ (2) | 20 mi |
| Mass Spray Foam Inc | 5.0★ (1) | 12 mi |
| MX AZTECA INSULATION | 5.0★ (1) | 12 mi |
| Patrick Handyman LLC | 5.0★ (1) | 13 mi |
| Revise Inc. | 3.0★ (2) | 22 mi |
| Sullivan Environmental Services | 5.0★ (1) | 4 mi |
| TekRoof | In Northborough | |
| Y&J Attic Insulation Services & Roofing Services Of Newton, MA | 2.5★ (2) | 22 mi |
| ZND-JACK Attic-Solution & Insulation's & Roofing Service Acton, MA | 5.0★ (2) | 16 mi |
| ZND-SAL Attic-Solution & Insulation's & Roofing Service Watertown, MA | 5.0★ (2) | 24 mi |
National price ranges in USD, not adjusted for Northborough. 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 102 Northborough 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 Northborough 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 |