16 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Marion: Thermal Shop, CR Score 60/100; 5.0★ from 92 Google reviews.
Most-reviewed: Kinzler Construction Services, 58 Google reviews at 4.5★, the most of 16 ranked after Thermal Shop; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
16 Marion insulation contractors are ranked here by CR Score, from ten published factors. 1 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 4.4★ across 16 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Thermal Shop | 60 | 5.0★ (92) | Cedar Rapids, 9 mi away | — | Overall |
| 2 | Classic Spray Foam Insulation | 57 | 4.8★ (16) | Cedar Rapids, 5 mi away | Sat · Evenings | — |
| 3 | Kinzler Construction Services | 57 | 4.5★ (58) | Cedar Rapids, 11 mi away | — | Most reviews |
| 4 | Weather Technicians of Iowa | 55 | 5.0★ (37) | North Liberty, 20 mi away | — | — |
| 5 | Menefee Drywall Co, Inc. | 55 | 4.0★ (29) | Cedar Rapids, 7 mi away | — | — |
| 6 | Extreme Spray Foam of Cedar Rapids | 53 | 5.0★ (13) | Cedar Rapids, 12 mi away | — | — |
| 7 | Active Thermal Concepts Inc | 53 | 2.6★ (5) | Hiawatha, 4 mi away | Sun · Evenings | — |
| 8 | Cal-Co Spray Coatings & Floor Coatings | 53 | 3.9★ (18) | Asbury, 11 mi away | — | — |
| 9 | Contractor Services of Iowa | 53 | 3.0★ (12) | Cedar Rapids, 4 mi away | — | — |
| 10 | Eastern Iowa Spray Foam & Waterproofing LLC | 52 | 3.8★ (17) | Cedar Rapids, 4 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: 5.0★ from 92 Google reviews, the most in Marion.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cedar Rapids, 5 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cedar Rapids, 11 mi away
Ranked #3 because of its Google rating and trade focus: 4.5★ from 58 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Liberty, 20 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cedar Rapids, 7 mi away
Ranked #5 because of its Google rating and trade focus: 4.0★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cedar Rapids, 12 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hiawatha, 4 mi away
Ranked #7 because of its Google rating and trade focus: 2.6★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Asbury, 11 mi away
Ranked #8 because of its Google rating and trade focus: 3.9★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cedar Rapids, 4 mi away
Ranked #9 because of its Google rating and trade focus: 3.0★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cedar Rapids, 4 mi away
Ranked #10 because of its Google rating and trade focus: 3.8★ from 17 Google reviews, listed on Google as “Waterproofing service”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Cedar Rapids, 8 mi away
Ranked #11 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Cedar Rapids, 4 mi away
Ranked #12 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 Cedar Rapids, 16 mi away
Ranked #13 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.
Based in Cedar Rapids, 7 mi away
Ranked #14 because of its Google rating and review volume: 4.2★ from 41 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Coralville, 23 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Cedar Rapids, 4 mi away
Ranked #16 because of its Google rating and review volume: 4.3★ from 16 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Marion. 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 16 Marion 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 Marion 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 |