55 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Londonderry: Neeeco, CR Score 84/100; 4.9★ from 3,580 Google reviews; open Saturdays until 4 PM.
Best for emergencies (open 24/7): TH Finish Carpentry - Carpenter in Nashua, posts 24/7 hours; ranked #2 of 55.
Most-reviewed: Revise Inc., 805 Google reviews at 4.6★, the most of 55 ranked after Neeeco; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
55 Londonderry insulation contractors are ranked here by CR Score, from 8 published factors. 4 are open 24/7, 28 open Saturdays and 8 open Sundays, based on posted hours. The median Google rating is 4.8★ across 55 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Neeeco | 84 | 4.9★ (3,580) | Wilmington, 22 mi away | Sat · Evenings | Overall |
| 2 | TH Finish Carpentry - Carpenter in Nashua | 83 | 5.0★ (12) | Nashua, 9 mi away | 24/7 | Emergencies |
| 3 | CJS Construction | 82 | 5.0★ (15) | Hudson, 9 mi away | Sat · Sun | — |
| 4 | East Coast Drywall Services | 81 | 5.0★ (13) | Lebanon, 10 mi away | Sat · Sun · Evenings | — |
| 5 | Mill City Energy | 81 | 5.0★ (16) | Auburn, 10 mi away | — | — |
| 6 | My Home Contracting | 81 | 5.0★ (7) | Concord, 20 mi away | 24/7 | — |
| 7 | Revise Inc. | 80 | 4.6★ (805) | Haverhill, 16 mi away | Sat | Most reviews |
| 8 | USA Insulation of Southern NH | 80 | 4.6★ (291) | Manchester, 11 mi away | Sat | — |
| 9 | Aspen Environmental, LLC | 80 | 4.8★ (108) | Methuen, 13 mi away | 24/7 | — |
| 10 | Polar Bear Insulation Co Incorporated | 78 | 4.6★ (16) | Lawrence, 16 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 review volume: 4.9★ from 3,580 Google reviews, the most Google reviews on this list (3,580).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Nashua, 9 mi away
Ranked #2 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, 9 mi away
Ranked #3 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 Lebanon, 10 mi away
Ranked #4 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 Auburn, 10 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ 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 Concord, 20 mi away
Ranked #6 because of its Google rating and availability: 5.0★ from 7 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Haverhill, 16 mi away
Ranked #7 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 Manchester, 11 mi away
Ranked #8 because of its Google rating and trade focus: 4.6★ from 291 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 #9 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 Lawrence, 16 mi away
Ranked #10 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 Methuen, 13 mi away
Ranked #11 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 Lowell, 17 mi away
Ranked #12 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 Hudson, 9 mi away
Ranked #13 because of its Google rating and availability: 4.7★ from 6 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lawrence, 16 mi away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Derry, 3 mi away
Ranked #15 because of its Google rating and availability: 4.6★ from 21 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Methuen, 13 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Haverhill, 16 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 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Tewksbury, 20 mi away
Ranked #18 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 Auburn, 4 mi away
Ranked #19 because of its Google rating and availability: 5.0★ from 6 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Auburn, 11 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 38 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lowell, 17 mi away
Ranked #21 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.
Based in Bedford, 20 mi away
Ranked #22 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 Acton, 21 mi away
Ranked #23 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 Haverhill, 15 mi away
Ranked #24 because of its Google rating and trade focus: 4.5★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Milford, 17 mi away
Ranked #25 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.
National price ranges in USD, not adjusted for Londonderry. 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 55 Londonderry 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 Londonderry 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 |