50 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Guilford: AMP'd Enterprises LLC, CR Score 58/100; 4.9★ from 78 Google reviews; open Saturdays until 1 PM.
Best for emergencies (open 24/7): Eli Construction Services Inc, posts 24/7 hours; ranked #15 of 50.
Most-reviewed: Power Home Remodeling, 3,018 Google reviews at 4.6★, the most of 50 ranked; ranked #24.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
50 Guilford insulation contractors are ranked here by CR Score, from ten published factors. 2 are open 24/7, 25 open Saturdays and 8 open Sundays, based on posted hours. The median Google rating is 4.9★ across 50 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | AMP'd Enterprises LLC | 58 | 4.9★ (78) | Branford, 5 mi away | Sat · Evenings | Overall |
| 2 | Nealon Insulation of Connecticut | 57 | 5.0★ (66) | Guilford | — | — |
| 3 | New England Performance Insulation | 56 | 5.0★ (153) | Milford, 18 mi away | Sat | — |
| 4 | Right Way Insulation | 53 | 5.0★ (33) | Darien, 16 mi away | Sat | — |
| 5 | Baybrook Remodelers Inc | 53 | 4.5★ (97) | West Haven, 15 mi away | Sat | — |
| 6 | Element Shield LLC | 53 | 5.0★ (21) | Cheshire, 14 mi away | Sat | — |
| 7 | OnTime Insulation | 53 | 5.0★ (20) | West Haven, 14 mi away | Sat · Evenings | — |
| 8 | Ortiz Spray Foam Insulation, LLC | 53 | 5.0★ (32) | Bethel, 18 mi away | Sat | — |
| 9 | Koala Insulation of Southern Connecticut | 53 | 5.0★ (113) | Shelton, 22 mi away | — | — |
| 10 | CT Spray Foam Insulation LLC | 52 | 5.0★ (13) | Cheshire, 20 mi away | Sat · Sun · Evenings | — |
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: 4.9★ from 78 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Guilford
Ranked #2 because of its Google rating and trade focus: 5.0★ from 66 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milford, 18 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 153 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darien, 16 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Haven, 15 mi away
Ranked #5 because of its Google rating and trade focus: 4.5★ from 97 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cheshire, 14 mi away
Ranked #6 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 West Haven, 14 mi away
Ranked #7 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 Bethel, 18 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Shelton, 22 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 113 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cheshire, 20 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Milford, 22 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 39 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bristol, 15 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 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 5 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wallingford, 14 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Calverton, 22 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 16 mi away
Ranked #16 because of its Google rating and trade focus: 3.7★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeport, 15 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wallingford, 15 mi away
Ranked #18 because of its Google rating and trade focus: 4.3★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Cheshire, 14 mi away
Ranked #19 because of its Google rating and trade focus: 4.3★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Old Saybrook, 15 mi away
Ranked #20 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeport, 11 mi away
Ranked #21 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ansonia, 15 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Haven, 13 mi away
Ranked #23 because of its Google rating and trade focus: 4.4★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Trumbull, 24 mi away
Ranked #24 because of its Google rating and review volume: 4.6★ from 3,018 Google reviews, the most in Guilford.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in New Haven, 11 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation 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 #50, 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.
National price ranges in USD, not adjusted for Guilford. 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 50 Guilford 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 Guilford 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 |