70 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Marvin: Crawl Space Brothers, CR Score 90/100; 5.0★ from 309 Google reviews; open 24/7.
Best for emergencies (open 24/7): Koala Insulation of Greater Charlotte, posts 24/7 hours; ranked #2 of 70.
Most-reviewed: Power Home Remodeling, 2,444 Google reviews at 4.7★, the most of 70 ranked; ranked #17.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
70 Marvin insulation contractors are ranked here by CR Score, from 8 published factors. 9 are open 24/7, 37 open Saturdays and 21 open Sundays, based on posted hours. The median Google rating is 4.9★ across 70 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Crawl Space Brothers | 90 | 5.0★ (309) | Charlotte, 12 mi away | 24/7 | Overall |
| 2 | Koala Insulation of Greater Charlotte | 88 | 4.9★ (86) | Charlotte, 10 mi away | 24/7 | Emergencies |
| 3 | Crawl Space Brothers | 87 | 4.9★ (52) | Matthews, 11 mi away | 24/7 | — |
| 4 | Simon Quality Construction | 85 | 5.0★ (166) | Charlotte, 15 mi away | Sat · Sun · Evenings | — |
| 5 | Crawl Space Ninja of Charlotte | 84 | 4.8★ (125) | Stallings, 10 mi away | Sat · Sun | — |
| 6 | Behr Insulation | 84 | 5.0★ (73) | Matthews, 12 mi away | Sat · Sun · Evenings | — |
| 7 | Koala Insulation of Greater South Charlotte | 83 | 4.4★ (18) | Matthews, 11 mi away | 24/7 | — |
| 8 | Home Shield Insulation of Charlotte | 83 | 4.9★ (136) | Charlotte, 6 mi away | Sat · Evenings | — |
| 9 | iFOAM Insulation | 82 | 4.9★ (29) | Fort Mill, 9 mi away | — | — |
| 10 | Ace Handyman Services | 82 | 4.8★ (215) | Matthews, 11 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: 5.0★ from 309 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 10 mi away
Ranked #2 because of its Google rating and availability: 4.9★ from 86 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Matthews, 11 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 52 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 15 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 166 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Stallings, 10 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 125 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Matthews, 12 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 73 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Matthews, 11 mi away
Ranked #7 because of its Google rating and availability: 4.4★ from 18 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 6 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 136 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Mill, 9 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Matthews, 11 mi away
Ranked #10 because of its Google rating and availability: 4.8★ from 215 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 6 mi away
Ranked #11 because of its Google rating and availability: 4.8★ from 73 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Monroe, 10 mi away
Ranked #12 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 11 mi away
Ranked #13 because of its Google rating and trade focus: 4.6★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Charlotte, 19 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 620 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 13 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 15 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 66 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 11 mi away
Ranked #17 because of its Google rating and review volume: 4.7★ from 2,444 Google reviews, the most Google reviews on this list (2,444).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 16 mi away
Ranked #18 because of its Google rating and review volume: 4.7★ from 526 Google reviews, 526 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 13 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 200 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Gastonia, 17 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Wesley Chapel, 4 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 16 mi away
Ranked #22 because of its Google rating and availability: 4.8★ from 257 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 17 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 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 22 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 56 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Charlotte, 13 mi away
Ranked #25 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.
National price ranges in USD, not adjusted for Marvin. 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 70 Marvin 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 Marvin 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 |