10 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Waterloo: RetroFoam Iowa, CR Score 65/100; 4.7★ from 69 Google reviews.
Best for emergencies (open 24/7): Solar spray foam insulation inc., posts 24/7 hours; ranked #5 of 10.
Most-reviewed: DeFord Spray Foam & Concrete Lifting, 48 Google reviews at 5.0★, the most of 10 ranked after RetroFoam Iowa; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
10 Waterloo insulation contractors are ranked here by CR Score, from ten published factors. 1 is open 24/7, 2 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 5.0★ across 10 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | RetroFoam Iowa | 65 | 4.7★ (69) | Waterloo | — | Overall |
| 2 | DeFord Spray Foam & Concrete Lifting | 59 | 5.0★ (48) | Waterloo | — | Most reviews |
| 3 | Extreme Spray Foam of Waterloo | 59 | 5.0★ (13) | Waterloo | — | — |
| 4 | Midwest Foam and Insulation, Inc. | 58 | 5.0★ (25) | Cedar Falls, 9 mi away | — | — |
| 5 | Solar spray foam insulation inc. | 58 | 5.0★ (6) | Elgin, 14 mi away | 24/7 | Emergencies |
| 6 | Kinzler Construction Services | 56 | 4.9★ (7) | Cedar Falls, 3 mi away | — | — |
| 7 | Weber Urethane Insulation Inc | 54 | 5.0★ (5) | Waterloo | — | — |
| 8 | iFOAM Insulation | 54 | 5.0★ (4) | Cedar Falls, 6 mi away | — | — |
| 9 | Arctic Seal Inc. | 53 | 5.0★ (7) | Independence, 21 mi away | Sat | — |
| 10 | South Construction and Insulation LLC | 51 | 5.0★ (10) | Waverly, 13 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: 4.7★ from 69 Google reviews, the most in Waterloo.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Waterloo
Ranked #2 because of its Google rating and review volume: 5.0★ from 48 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waterloo
Ranked #3 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 Cedar Falls, 9 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Elgin, 14 mi away
Ranked #5 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 Cedar Falls, 3 mi away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waterloo
Ranked #7 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Roofing contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Cedar Falls, 6 mi away
Ranked #8 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 Independence, 21 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waverly, 13 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
8 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 |
|---|---|---|
| Don's Insulation & Roofing | In Waterloo | |
| Independence Spray & Injectable Insulation | 23 mi | |
| Iowa Insulation Plus | 19 mi | |
| Kennedy Insulation Systems | 5.0★ (2) | In Waterloo |
| QCI Thermal Systems | 3.5★ (2) | In Waterloo |
| Thermal Building Concepts | In Waterloo | |
| Vinci Insulation Services | 24 mi | |
| Weber Urethane Insulation Inc | 5.0★ (1) | In Waterloo |
National price ranges in USD, not adjusted for Waterloo. 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 10 Waterloo 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 Waterloo 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 |