131 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Chelmsford: HomeWorks Energy, CR Score 88/100; 4.7★ from 2,479 Google reviews; open 24/7.
Best for emergencies (open 24/7): TH Finish Carpentry - Carpenter in Nashua, posts 24/7 hours; ranked #4 of 131.
Most-reviewed: Power Home Remodeling, 4,159 Google reviews at 4.7★, the most of 131 ranked; ranked #27.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
131 Chelmsford insulation contractors are ranked here by CR Score, from 8 published factors. 11 are open 24/7, 77 open Saturdays and 19 open Sundays, based on posted hours. The median Google rating is 4.9★ across 131 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | HomeWorks Energy | 88 | 4.7★ (2,479) | Arlington, 21 mi away | 24/7 | Overall |
| 2 | Neeeco | 87 | 4.9★ (3,580) | Wilmington, 11 mi away | Sat · Evenings | — |
| 3 | EcoShield Pest Solutions | 84 | 4.8★ (3,069) | Winchester, 15 mi away | Sat | — |
| 4 | TH Finish Carpentry - Carpenter in Nashua | 82 | 5.0★ (12) | Nashua, 13 mi away | 24/7 | Emergencies |
| 5 | Efficient Buildings LLC | 81 | 5.0★ (10) | Hudson, 18 mi away | 24/7 | — |
| 6 | Scaffolding & Shoring Specialists | Lothrop Co | 81 | 4.8★ (9) | Malden, 19 mi away | 24/7 | — |
| 7 | AirSealing America, LLC | 81 | 5.0★ (11) | West Concord, 8 mi away | Sat · Sun | — |
| 8 | Affordable Insulation | 80 | 5.0★ (27) | Lowell, 3 mi away | Sat | — |
| 9 | East Coast Drywall Services | 80 | 5.0★ (13) | Lebanon, 13 mi away | Sat · Sun · Evenings | — |
| 10 | Aspen Environmental, LLC | 80 | 4.8★ (108) | Methuen, 13 mi away | 24/7 | — |
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: 4.7★ from 2,479 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Wilmington, 11 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 3,580 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Winchester, 15 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 3,069 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Nashua, 13 mi away
Ranked #4 because of its Google rating and availability: 5.0★ from 12 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hudson, 18 mi away
Ranked #5 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 Malden, 19 mi away
Ranked #6 because of its Google rating and availability: 4.8★ from 9 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in West Concord, 8 mi away
Ranked #7 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 Lowell, 3 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lebanon, 13 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Methuen, 13 mi away
Ranked #10 because of its Google rating and availability: 4.8★ from 108 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Everett, 21 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 41 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Haverhill, 19 mi away
Ranked #12 because of its Google rating and trade focus: 4.6★ from 805 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lawrence, 13 mi away
Ranked #13 because of its Google rating and trade focus: 4.6★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Waltham, 17 mi away
Ranked #14 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 Acton, 3 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 77 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Arlington, 12 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Tewksbury, 9 mi away
Ranked #17 because of its Google rating and trade focus: 4.4★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Woburn, 13 mi away
Ranked #18 because of its Google rating and trade focus: 4.7★ from 59 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Methuen, 10 mi away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 68 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Burlington, 12 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 333 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Bedford, 9 mi away
Ranked #21 because of its Google rating and availability: 5.0★ from 15 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hudson, 22 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Beverly, 25 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 40 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Billerica, 12 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 Lowell, 3 mi away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 49 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 131 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.
National price ranges in USD, not adjusted for Chelmsford. 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 131 Chelmsford 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 Chelmsford 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 |