31 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Sun Prairie: Koala Insulation of Madison, CR Score 59/100; 5.0★ from 61 Google reviews.
Best for emergencies (open 24/7): Environmental Construction Services Inc., posts 24/7 hours; ranked #2 of 31.
Most-reviewed: Pharo Heating & Cooling, Inc., 832 Google reviews at 4.9★, the most of 31 ranked; ranked #13.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
31 Sun Prairie insulation contractors are ranked here by CR Score, from ten published factors. 2 are open 24/7, 10 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.9★ across 31 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Koala Insulation of Madison | 59 | 5.0★ (61) | Sun Prairie | — | Overall |
| 2 | Environmental Construction Services Inc. | 58 | 5.0★ (16) | Madison, 10 mi away | 24/7 | Emergencies |
| 3 | Infinity Exteriors | 58 | 4.9★ (335) | Madison, 10 mi away | 24/7 | — |
| 4 | BadgerTech, LLC | 57 | 5.0★ (8) | Sun Prairie | Sat | — |
| 5 | Spraytech Insulators of Madison | 56 | 4.9★ (24) | Madison, 8 mi away | Sat | — |
| 6 | Accurate-Airtight Exteriors | 56 | 4.9★ (59) | Madison, 8 mi away | — | — |
| 7 | Madison Spray Foam Insulation Pros | 56 | 5.0★ (24) | Fitchburg, 11 mi away | Sat | — |
| 8 | TNT Insulation, LLC | 56 | 4.8★ (17) | Sun Prairie | — | — |
| 9 | Wisconsin Spray Foam Insulation | 56 | 5.0★ (33) | Fitchburg, 8 mi away | — | — |
| 10 | Cellar to Attic Insulation | 55 | 4.9★ (16) | Lake Mills, 10 mi away | Sat · 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: 5.0★ from 61 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 10 mi away
Ranked #2 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 10 mi away
Ranked #3 because of its Google rating and review volume: 4.9★ from 335 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sun Prairie
Ranked #4 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 8 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 24 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 8 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 59 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 11 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sun Prairie
Ranked #8 because of its Google rating and trade focus: 4.8★ from 17 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 8 mi away
Ranked #9 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 Lake Mills, 10 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in McFarland, 11 mi away
Ranked #11 because of its Google rating and trade focus: 4.7★ from 77 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in McFarland, 11 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Waunakee, 10 mi away
Ranked #13 because of its Google rating and review volume: 4.9★ from 832 Google reviews, the most in Sun Prairie.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fort Atkinson, 24 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 64 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Middleton, 15 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Madison, 17 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 47 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 10 mi away
Ranked #17 because of its Google rating and trade focus: 4.3★ from 21 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waunakee, 10 mi away
Ranked #18 because of its Google rating and review volume: 5.0★ from 254 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 8 mi away
Ranked #19 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 Stoughton, 14 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Beloit, 21 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 10 mi away
Ranked #22 because of its Google rating and trade focus: 2.9★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Madison, 18 mi away
Ranked #23 because of its Google rating and review volume: 4.9★ from 276 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fitchburg, 13 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Concrete contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Stoughton, 19 mi away
Ranked #25 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.
#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 | Thermo-Tech Mechanical | 47 | 4.3★ (6) | 24 mi |
| 27 | Wisconsin Audio Video | 47 | 3.8★ (4) | 11 mi |
| 28 | Jams Painting LLC | 46 | 5.0★ (15) | 20 mi |
| 29 | Ace Exterior Solutions, LLC | 46 | 5.0★ (12) | 15 mi |
| 30 | Tuescher Painting & Drywall Finishing | 45 | 5.0★ (35) | 23 mi |
| 31 | Let Mikey Do It | 43 | 4.2★ (14) | 21 mi |
16 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 |
|---|---|---|
| Bison Inc. | 6 mi | |
| Foamguard | 5.0★ (1) | 6 mi |
| Ganser Company, Inc. | 11 mi | |
| Jen's Home Improvement Pros | 4.8★ (26) | In Sun Prairie |
| Johnson L.L.C. | 8 mi | |
| M&J | 5.0★ (2) | 12 mi |
| Raymer Pipe & Duct Insulation Inc | 14 mi | |
| Rockweiler Insulation, Inc. | 21 mi | |
| Scott McNeill Enterprises LLC | In Sun Prairie | |
| Spray Cell LLC | 5.0★ (1) | 21 mi |
| The Crew Home Improvement LLC | 20 mi | |
| Thermal Design Inc | 5.0★ (1) | 18 mi |
| Trachte Building Systems Inc | 4.4★ (65) | In Sun Prairie |
| Wes Nasi Construction LLC | In Sun Prairie | |
| Zander Insulation Inc | 5.0★ (1) | 19 mi |
| Zeier's Siding & Insulation | 11 mi |
National price ranges in USD, not adjusted for Sun Prairie. 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 Sun Prairie 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 23, 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 Sun Prairie 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 |