25 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Norwalk: Service Legends Heating & Cooling, Plumbing & Electrical, CR Score 58/100; 4.9★ from 5,373 Google reviews; open 24/7.
Best for emergencies (open 24/7): Iowa Spray Foam Insulators, LLC, posts 24/7 hours; ranked #6 of 25.
Most-reviewed: Home Solutions of Iowa, 341 Google reviews at 4.7★, the most of 25 ranked after Service Legends Heating & Cooling, Plumbing & Electrical; ranked #22.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
25 Norwalk insulation contractors are ranked here by CR Score, from ten published factors. 2 are open 24/7, 7 open Saturdays and 4 open Sundays, based on posted hours. The median Google rating is 4.8★ across 25 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Service Legends Heating & Cooling, Plumbing & Electrical | 58 | 4.9★ (5,373) | Des Moines, 15 mi away | 24/7 | Overall |
| 2 | Rohan Drywall LLC | 56 | 4.7★ (29) | Des Moines, 10 mi away | Sat · Sun · Evenings | — |
| 3 | Top Gun Contractors of Grimes | 56 | 5.0★ (13) | Clive, 9 mi away | Sat · Sun · Evenings | — |
| 4 | L&L Home Solutions | 55 | 4.9★ (133) | Clive, 9 mi away | — | — |
| 5 | Infinity Insulation | 55 | 4.8★ (53) | Des Moines, 11 mi away | Sat · Evenings | — |
| 6 | Iowa Spray Foam Insulators, LLC | 54 | 3.4★ (5) | Grimes, 13 mi away | 24/7 | Emergencies |
| 7 | Attic Solutions by Prevailing Resources LLC | 52 | 4.6★ (53) | Ankeny, 19 mi away | Sat · Evenings | — |
| 8 | Des Moines Spray Foam Insulation | 52 | 5.0★ (24) | Ankeny, 14 mi away | — | — |
| 9 | Mid-Iowa Environmental | 52 | 4.3★ (7) | Des Moines, 6 mi away | — | — |
| 10 | Contractor Services of Iowa | 52 | 4.1★ (22) | West Des Moines, 8 mi away | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 in Norwalk
Based in Des Moines, 15 mi away
Ranked #1 because of its Google rating and review volume: 4.9★ from 5,373 Google reviews, the most in Norwalk.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 10 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 29 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Clive, 9 mi away
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 Clive, 9 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 133 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Des Moines, 11 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 53 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Grimes, 13 mi away
Ranked #6 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ankeny, 19 mi away
Ranked #7 because of its Google rating and trade focus: 4.6★ from 53 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ankeny, 14 mi away
Ranked #8 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 Des Moines, 6 mi away
Ranked #9 because of its Google rating and trade focus: 4.3★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Des Moines, 8 mi away
Ranked #10 because of its Google rating and trade focus: 4.1★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ankeny, 15 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 28 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Indianola, 10 mi away
Ranked #12 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 Des Moines, 12 mi away
Ranked #13 because of its Google rating and trade focus: 3.5★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Pleasant Hill, 13 mi away
Ranked #14 because of its Google rating and trade focus: 4.2★ from 26 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ankeny, 17 mi away
Ranked #15 because of its Google rating and trade focus: 4.3★ from 40 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Clive, 15 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waukee, 12 mi away
Ranked #17 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 Ankeny, 17 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ankeny, 23 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Grimes, 13 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ankeny, 23 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 51 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Waukee, 13 mi away
Ranked #22 because of its Google rating and review volume: 4.7★ from 341 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ankeny, 15 mi away
Ranked #23 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ankeny, 16 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “Handyman/Handywoman/Handyperson”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Indianola, 13 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Wood floor installation service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Norwalk. 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 25 Norwalk 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 Norwalk 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 |