8 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Fond du Lac: Extreme Spray Foam of Fond Du Lac, CR Score 62/100; 4.8★ from 20 Google reviews.
Most-reviewed: Spraytech Insulators of Oshkosh, 18 Google reviews at 4.8★, the most of 8 ranked after Extreme Spray Foam of Fond Du Lac; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
8 Fond du Lac insulation contractors are ranked here by CR Score, from ten published factors. 4 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 5.0★ across 8 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Extreme Spray Foam of Fond Du Lac | 62 | 4.8★ (20) | Fond du Lac | — | Overall |
| 2 | Weather Blanket Insulation | 62 | 5.0★ (8) | Fond du Lac | — | — |
| 3 | Sky The Foam Guy LLC. | 59 | 5.0★ (3) | Fond du Lac | Sat · Sun | — |
| 4 | Premier North Insulation | 58 | 4.3★ (12) | West Bend, 21 mi away | Sat · Sun · Evenings | — |
| 5 | Spraytech Insulators of Oshkosh | 57 | 4.8★ (18) | Oshkosh, 21 mi away | — | Most reviews |
| 6 | Maximum R Spray Foam | 56 | 5.0★ (10) | Ripon, 23 mi away | Sat | — |
| 7 | Bart's Insulation Solutions, LLC. | 55 | 5.0★ (3) | Oshkosh, 16 mi away | Sat · Sun · Evenings | — |
| 8 | Amundson Insulation Inc | 55 | 5.0★ (12) | West Bend, 23 mi away | — | — |
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 review volume: 4.8★ from 20 Google reviews, the most in Fond du Lac.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fond du Lac
Ranked #2 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Fond du Lac
Ranked #3 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Bend, 21 mi away
Ranked #4 because of its Google rating and trade focus: 4.3★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshkosh, 21 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ripon, 23 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Oshkosh, 16 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Bend, 23 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Fond du Lac. 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 8 Fond du Lac 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 Fond du Lac 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 |