34 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Cottage Grove: Environmental Construction Services Inc., CR Score 87/100; 5.0★ from 16 Google reviews; open 24/7.
Best for emergencies (open 24/7): Infinity Exteriors, posts 24/7 hours; ranked #2 of 34.
Most-reviewed: Pharo Heating & Cooling, Inc., 832 Google reviews at 4.9★, the most of 34 ranked; ranked #18.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
34 Cottage Grove insulation contractors are ranked here by CR Score, from 8 published factors. 2 are open 24/7, 11 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 5.0★ across 34 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Environmental Construction Services Inc. | 87 | 5.0★ (16) | Madison, 8 mi away | 24/7 | Overall |
| 2 | Infinity Exteriors | 87 | 4.9★ (335) | Madison, 6 mi away | 24/7 | Emergencies |
| 3 | City Wide, Inc. | 83 | 5.0★ (11) | McFarland, 6 mi away | — | — |
| 4 | Spraytech Insulators of Madison | 81 | 4.9★ (24) | Madison, 6 mi away | Sat | — |
| 5 | Cellar to Attic Insulation | 81 | 4.9★ (16) | Lake Mills, 4 mi away | Sat · Evenings | — |
| 6 | Madison Spray Foam Insulation Pros | 80 | 5.0★ (24) | Fitchburg, 9 mi away | Sat | — |
| 7 | BadgerTech, LLC | 80 | 5.0★ (8) | Sun Prairie, 3 mi away | Sat | — |
| 8 | Rainbow Insulators Inc. | 80 | 5.0★ (10) | Middleton, 15 mi away | — | — |
| 9 | Hastings Water Well Service & Foam Insulation | 80 | 5.0★ (6) | Cottage Grove | Sat | — |
| 10 | Wisconsin Spray Foam Insulation | 80 | 5.0★ (33) | Fitchburg, 1 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 availability: 5.0★ from 16 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 6 mi away
Ranked #2 because of its Google rating and availability: 4.9★ from 335 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in McFarland, 6 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Madison, 6 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 24 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Lake Mills, 4 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fitchburg, 9 mi away
Ranked #6 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 Sun Prairie, 3 mi away
Ranked #7 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 Middleton, 15 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Cottage Grove
Ranked #9 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fitchburg, 1 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Atkinson, 19 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 64 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sun Prairie, 5 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 61 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cottage Grove
Ranked #13 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 7 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 59 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Stoughton, 6 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in McFarland, 6 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 77 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Sun Prairie, 7 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 17 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Waunakee, 12 mi away
Ranked #18 because of its Google rating and review volume: 4.9★ from 832 Google reviews, the most Google reviews on this list (832).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in South Beloit, 14 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 5 mi away
Ranked #20 because of its Google rating and trade focus: 4.3★ from 21 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Madison, 20 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 47 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in McFarland, 6 mi away
Ranked #22 because of its Google rating and availability: 3.8★ from 4 Google reviews, open 7 days a week.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Waunakee, 12 mi away
Ranked #23 because of its Google rating and review volume: 5.0★ from 254 Google reviews, 254 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fitchburg, 23 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 28 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Stoughton, 12 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 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #34, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | Alpine Insulation | 73 | 2.9★ (8) | 5 mi |
| 27 | Janesville Spray Foam Insulation | 73 | 5.0★ (22) | 24 mi |
| 28 | American Home Consultants | 73 | 5.0★ (6) | 14 mi |
| 29 | Ace Handyman Services Madison West | 72 | 4.9★ (276) | 16 mi |
| 30 | Extreme Spray Foam of Madison | 71 | 5.0★ (25) | 12 mi |
| 31 | Jams Painting LLC | 70 | 5.0★ (15) | 13 mi |
| 32 | Tuescher Painting & Drywall Finishing | 69 | 5.0★ (35) | 16 mi |
| 33 | Ace Exterior Solutions, LLC | 67 | 5.0★ (12) | 14 mi |
| 34 | Let Mikey Do It | 66 | 4.2★ (14) | 14 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 |
|---|---|---|
| Aesthetic Siding & Windows | 5.0★ (1) | In Cottage Grove |
| Becker Home Improvement | 5.0★ (2) | In Cottage Grove |
| Bison Inc. | 9 mi | |
| C.M. Morris Group, Inc. | 4.5★ (2) | In Cottage Grove |
| Foamguard | 5.0★ (1) | 11 mi |
| Ganser Company, Inc. | 6 mi | |
| Johnson L.L.C. | 6 mi | |
| M&J | 5.0★ (2) | 15 mi |
| Raymer Pipe & Duct Insulation Inc | 10 mi | |
| Rockweiler Insulation, Inc. | 18 mi | |
| Spray Cell LLC | 5.0★ (1) | 19 mi |
| Thermal Design Inc | 5.0★ (1) | 10 mi |
| Wes Nasi Construction LLC | 5.0★ (2) | 24 mi |
| Wes Nasi Construction LLC | 9 mi | |
| Zander Insulation Inc | 5.0★ (1) | 17 mi |
| Zeier's Siding & Insulation | 14 mi |
National price ranges in USD, not adjusted for Cottage Grove. 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 34 Cottage Grove 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 Cottage Grove 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 |