31 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Harvard: Moxie Pest Control, CR Score 80/100; 4.5★ from 2,575 Google reviews; open Saturdays until 4 PM.
Best for emergencies (open 24/7): American Temperature Control Inc, posts 24/7 hours; ranked #6 of 31.
Most-reviewed: Ace Handyman Services Northern McHenry Western Lake Counties, 278 Google reviews at 4.9★, the most of 31 ranked after Moxie Pest Control; ranked #16.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
31 Harvard insulation contractors are ranked here by CR Score, from 8 published factors. 1 is open 24/7, 16 open Saturdays and 10 open Sundays, based on posted hours. The median Google rating is 4.7★ across 31 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Moxie Pest Control | 80 | 4.5★ (2,575) | Algonquin, 23 mi away | Sat | Overall |
| 2 | Gallagly Drywall Inc | 76 | 3.0★ (4) | Harvard | Sat · Sun | — |
| 3 | Diversified Insulation | 75 | 4.9★ (223) | Burlington, 24 mi away | — | — |
| 4 | Astro Insulation | 75 | 4.4★ (7) | Fox Lake, 17 mi away | — | — |
| 5 | ADL Brothers LLC | 74 | 5.0★ (5) | Woodstock, 24 mi away | Sat · Sun · Evenings | — |
| 6 | American Temperature Control Inc | 74 | 4.9★ (29) | Algonquin, 24 mi away | 24/7 | Emergencies |
| 7 | Holian Industries | 74 | 4.8★ (6) | Spring Grove, 19 mi away | — | — |
| 8 | Dynico Roofing | 74 | 5.0★ (191) | McHenry, 19 mi away | Sat · Evenings | — |
| 9 | R&R Climate Inc | 73 | 5.0★ (19) | Huntley, 14 mi away | Sat · Sun · Evenings | — |
| 10 | Building Energy Experts | 72 | 4.7★ (61) | Crystal Lake, 20 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: 4.5★ from 2,575 Google reviews, the most Google reviews on this list (2,575).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Harvard
Ranked #2 because of its Google rating and trade focus: 3.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Burlington, 24 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 223 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fox Lake, 17 mi away
Ranked #4 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 Woodstock, 24 mi away
Ranked #5 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 Algonquin, 24 mi away
Ranked #6 because of its Google rating and availability: 4.9★ from 29 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Spring Grove, 19 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ 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 McHenry, 19 mi away
Ranked #8 because of its Google rating and review volume: 5.0★ from 191 Google reviews, 191 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Huntley, 14 mi away
Ranked #9 because of its Google rating and availability: 5.0★ from 19 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Crystal Lake, 20 mi away
Ranked #10 because of its Google rating and trade focus: 4.7★ from 61 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Woodstock, 14 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 19 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Crystal Lake, 21 mi away
Ranked #12 because of its Google rating and review volume: 5.0★ from 82 Google reviews, 82 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Belvidere, 19 mi away
Ranked #13 because of its Google rating and availability: 4.3★ from 58 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Loves Park, 24 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Crystal Lake, 22 mi away
Ranked #15 because of its Google rating and trade focus: 4.6★ from 54 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in McHenry, 18 mi away
Ranked #16 because of its Google rating and review volume: 4.9★ from 278 Google reviews, 278 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Crystal Lake, 21 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in McHenry, 18 mi away
Ranked #18 because of its Google rating and availability: 4.3★ from 10 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lake Geneva, 16 mi away
Ranked #19 because of its Google rating and availability: 4.0★ from 4 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rockford, 24 mi away
Ranked #20 because of its Google rating and review volume: 4.9★ from 203 Google reviews, 203 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Algonquin, 22 mi away
Ranked #21 because of its Google rating and availability: 4.3★ from 6 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fox Lake, 23 mi away
Ranked #22 because of its Google rating and availability: 4.3★ from 7 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Rockford, 23 mi away
Ranked #23 because of its Google rating and review volume: 4.6★ from 54 Google reviews, 54 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Crystal Lake, 22 mi away
Ranked #24 because of its Google rating and availability: 4.0★ from 3 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Machesney Park, 22 mi away
Ranked #25 because of its Google rating and availability: 4.3★ from 6 Google reviews, open Saturdays until 6 PM.
Based on 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #31, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | DBC Home Remodel | 64 | 5.0★ (9) | 22 mi |
| 27 | Everest Roofing | 64 | 4.8★ (67) | 25 mi |
| 28 | Badgerland Supply | 63 | 4.8★ (13) | 20 mi |
| 29 | Custom Roofing Contracting, Ltd. | 63 | 4.6★ (45) | 25 mi |
| 30 | Ferguson Plumbing Supply | 61 | 4.3★ (6) | 20 mi |
| 31 | Thermaseal / Lakeside | 59 | 3.4★ (15) | 23 mi |
15 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 |
|---|---|---|
| a to z insulation | 5.0★ (1) | 20 mi |
| Affordable Construction Company | 3.8★ (4) | In Harvard |
| Air Management Services Inc | 4.0★ (2) | In Harvard |
| Choice Insulation | 16 mi | |
| Energy Smart Insulation | 3.0★ (1) | 21 mi |
| Genoa Insulation | 23 mi | |
| Home Guard Insulation | 4.0★ (2) | 24 mi |
| Insulation Service | 15 mi | |
| Saunders Insulation Specialists | 21 mi | |
| Schoonover Insulation Inc | 3.0★ (1) | 23 mi |
| Southwest Insulation, Inc. | 23 mi | |
| Superior Attic Fans | 5.0★ (2) | 23 mi |
| Tailored Foam Midwest | 24 mi | |
| TBD Painting Inc. | 25 mi | |
| Wildlife Animal & Bee Removal Guys | 3.0★ (2) | 13 mi |
National price ranges in USD, not adjusted for Harvard. 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 31 Harvard 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 Harvard 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 |