62/100CR Score
Ranked #1 because of its Google rating and review volume: 4.9★ from 271 Google reviews, the most in South Beloit.
- 4.9★ from 271 Google reviews
- Hours
- Mon–Fri 7:30 AM–5 PM · Sat–Sun 9 AM–5 PM
- Address
- 612 Harrison Ave, Rockford, IL 61104
Best Insulation Contractors in South Beloit, IL (2026)
18 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in South Beloit: Comfort 1st Insulation, CR Score 62/100; 4.9★ from 271 Google reviews; open 7 days a week.
- 9
Best for emergencies (open 24/7): Legan Construction & Remodeling, posts 24/7 hours; ranked #9 of 18.
- 11
Most-reviewed: Greenlink Energy Solutions, 203 Google reviews at 4.9★, the most of 18 ranked after Comfort 1st Insulation; ranked #11.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
18 South Beloit insulation contractors are ranked here by CR Score, from ten published factors. 1 is open 24/7, 8 open Saturdays and 7 open Sundays, based on posted hours. The median Google rating is 4.8★ across 18 rated businesses.
Top 10 insulation contractors in South Beloit at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Comfort 1st Insulation | 62 | 4.9★ (271) | Rockford, 18 mi away | Sat · Sun | Overall |
| 2 | Top Tier Insulation LLC | 58 | 4.9★ (35) | South Beloit | — | — |
| 3 | Janesville Spray Foam Insulation | 57 | 5.0★ (22) | South Beloit | — | — |
| 4 | Rockford Spray Foam Insulation | 55 | 5.0★ (24) | Loves Park, 12 mi away | — | — |
| 5 | Metro Insulation | 54 | 4.7★ (34) | Rockford, 14 mi away | — | — |
| 6 | Dwyer Foam Insulation | 54 | 5.0★ (3) | Beloit, 5 mi away | Sun · Evenings | — |
| 7 | Janesville | 53 | 5.0★ (4) | Janesville, 16 mi away | Sat · Sun · Evenings | — |
| 8 | Beneficial Insulation Solutions | 53 | 5.0★ (3) | Janesville, 15 mi away | Sat · Sun · Evenings | — |
| 9 | Legan Construction & Remodeling | 52 | 4.7★ (12) | Janesville, 10 mi away | 24/7 | Emergencies |
| 10 | A+ (Plus) Insulation Janesville | 52 | 4.2★ (13) | Janesville, 13 mi away | — | — |
The 18 best insulation contractors in South Beloit, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in South Beloit
58/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 35 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
Based in South Beloit
57/100CR ScoreRanked #3 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 22 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
Based in Loves Park, 12 mi away
55/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 24 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
Based in Rockford, 14 mi away
54/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ from 34 Google reviews, listed on Google as “Insulation contractor”.
- 4.7★ from 34 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 2119 N Central Ave, Rockford, IL 61101
Based in Beloit, 5 mi away
54/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Fri 7 AM–8 PM · Sat closed · Sun 7 AM–8 PM
- Address
- 2600 W Creedy Rd, Beloit, WI 53511
#7 Janesville
Based in Janesville, 16 mi away
53/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 4 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 4029 N County Rd F Unit J-7, Janesville, WI 53545
Based in Janesville, 15 mi away
53/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Sun 7 AM–8 PM
- Address
- Janesville, WI 53547
Based in Janesville, 10 mi away
52/100CR ScoreRanked #9 because of its Google rating and availability: 4.7★ from 12 Google reviews, open 24/7.
- 4.7★ from 12 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3446 Stellar Dr, Janesville, WI 53548
Based in Janesville, 13 mi away
52/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.2★ from 13 Google reviews, listed on Google as “Insulation contractor”.
- 4.2★ from 13 Google reviews
- Hours
- Mon–Fri 8 AM–4 PM · Sat–Sun closed
Based in Rockford, 18 mi away
52/100CR ScoreRanked #11 because of its Google rating and review volume: 4.9★ from 203 Google reviews.
- 4.9★ from 203 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 3020 Forest View Rd, Rockford, IL 61109
Based in Harvard, 24 mi away
50/100CR ScoreRanked #12 because of its Google rating and trade focus: 3.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
- 3.0★ from 4 Google reviews
- Hours
- Mon–Sun 8 AM–5 PM
- Address
- 18725 Crowley Rd, Harvard, IL 60033
Based in Belvidere, 18 mi away
50/100CR ScoreRanked #13 because of its Google rating and review volume: 4.3★ from 58 Google reviews.
- 4.3★ from 58 Google reviews
- Hours
- Mon–Fri 8 AM–4:30 PM · Sat–Sun 9 AM–5 PM
- Address
- 2231 Hawkey Dr, Belvidere, IL 61008
Based in Rockford, 16 mi away
50/100CR ScoreRanked #14 because of its Google rating and review volume: 4.6★ from 54 Google reviews.
- 4.6★ from 54 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 9 AM–12 PM · Sun closed
- Address
- 5758 Elaine Dr Suite 109, Rockford, IL 61108
#15 Everest Roofing
Based in Rockford, 18 mi away
48/100CR ScoreRanked #15 because of its Google rating and review volume: 4.8★ from 67 Google reviews.
- 4.8★ from 67 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 4701 Hydraulic Rd, Rockford, IL 61108
Based in Machesney Park, 8 mi away
48/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Roofing contractor”.
- 4.3★ from 6 Google reviews
- Hours
- Mon–Sat 8 AM–6 PM · Sun closed
- Address
- 994 Wissmach Ln, Machesney Park, IL 61115
Based in Janesville, 13 mi away
47/100CR ScoreRanked #17 because of its Google rating and review volume: 5.0★ from 18 Google reviews.
- 5.0★ from 18 Google reviews
- Hours
- Mon–Fri 8 AM–3:30 PM · Sat–Sun closed
- Address
- 1220 W Court St, Janesville, WI 53548
Based in Rockford, 16 mi away
44/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.5★ from 8 Google reviews, listed on Google as “Masonry contractor”.
- 4.5★ from 8 Google reviews
- Hours
- Mon–Fri 8 AM–4 PM · Sat–Sun closed
- Address
- 631 Cedar St, Rockford, IL 61101
Also serving South Beloit
7 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 |
|---|---|---|
| Home Guard Insulation | 4.0★ (2) | 15 mi |
| Rockford Insulation Pros | 16 mi | |
| Saunders Insulation Specialists | 7 mi | |
| Schoonover Insulation Inc | 3.0★ (1) | 1 mi |
| Sprinkmann Sons Corporation | 20 mi | |
| Swanson Spray Systems | 5.0★ (2) | 7 mi |
| Ultimate Roof Coaters | 17 mi |
How much do insulation contractors cost in South Beloit?
National price ranges in USD, not adjusted for South Beloit. 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 |
How we ranked South Beloit insulation contractors
We scored 18 South Beloit 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 South Beloit 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 |
Insulation contractors in South Beloit: frequently asked questions
Who is the best insulation contractor in South Beloit?
By CR Score, the highest-ranked insulation contractor in South Beloit, IL is Comfort 1st Insulation with a CR Score of 62/100. It has 4.9★ from 271 Google reviews. It is open 7 days a week. Top Tier Insulation LLC (#2) and Janesville Spray Foam Insulation (#3) follow. We ranked 18 insulation contractors on ten factors, last updated October 22, 2026.
How many insulation contractors are there in South Beloit?
ContractorsRanked ranks 18 insulation contractors serving South Beloit, IL. 2 of them are based in South Beloit; the rest serve it from nearby towns. Another 7 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which insulation contractors in South Beloit are open 24/7?
1 ranked insulation contractor in South Beloit posts 24/7 hours. The highest-ranked is Legan Construction & Remodeling (#9). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which insulation contractors in South Beloit work on weekends?
8 of 18 ranked insulation contractors post Saturday hours and 7 post Sunday hours. The highest-ranked open Saturdays are Comfort 1st Insulation (#1), Janesville (#7) and Beneficial Insulation Solutions (#8). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in South Beloit?
Attic insulation typically costs $1,700 to $2,500, with $2,100 typical (Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range). This is a national range, not adjusted for South Beloit. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do South Beloit insulation contractors have?
The median Google rating among 18 rated insulation contractors in South Beloit is 4.8★, with a median of 20 reviews. Comfort 1st Insulation has the most, 271 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank insulation contractors?
Each insulation contractor gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do insulation contractors outside South Beloit count in this ranking?
Yes, if they are within 25 mi of the South Beloit city center, our service radius for insulation contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Update log for South Beloit
- October 2026: CR Scores recalculated for 18 insulation contractors serving South Beloit.
More insulation contractors and South Beloit pages
Insulation contractors near South Beloit
- Insulation contractors in Rockton, IL15 ranked
- Insulation contractors in Roscoe, IL16 ranked
- Insulation contractors in Machesney Park, IL14 ranked
- Insulation contractors in Loves Park, IL14 ranked
- Insulation contractors in Poplar Grove, IL16 ranked
- Insulation contractors in Rockford, IL11 ranked
- Insulation contractors in Belvidere, IL13 ranked
- Insulation contractors in Harvard, IL24 ranked
- Insulation contractors in Marengo, IL39 ranked
- Insulation contractors in Woodstock, IL41 ranked
Other trades in South Beloit
- Roofers in South Beloit273 ranked
- Plumbers in South Beloit94 ranked
- Electricians in South Beloit80 ranked
- HVAC contractors in South Beloit132 ranked
- General contractors in South Beloit122 ranked
- Painters in South Beloit56 ranked
- Landscapers in South Beloit78 ranked
- Handymen in South Beloit25 ranked
- Kitchen remodelers in South Beloit73 ranked
- Bathroom remodelers in South Beloit78 ranked
- Flooring contractors in South Beloit53 ranked
- Tile installers in South Beloit10 ranked
- Drywall contractors in South Beloit8 ranked
- Concrete contractors in South Beloit92 ranked
- Fence contractors in South Beloit22 ranked
- Deck builders in South Beloit50 ranked
- Siding contractors in South Beloit154 ranked
- Window installers in South Beloit124 ranked
- Gutter installers in South Beloit64 ranked
- Solar installers in South Beloit17 ranked
- Garage door repair companies in South Beloit24 ranked
- Foundation repair companies in South Beloit38 ranked
- Tree services in South Beloit95 ranked
- Masonry contractors in South Beloit40 ranked
- Water damage restoration companies in South Beloit98 ranked
- Home builders in South Beloit101 ranked
- Demolition contractors in South Beloit14 ranked
- All contractors in South Beloit