46 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Saint Peters: iFOAM Insulation of O'Fallon, CR Score 62/100; 5.0★ from 113 Google reviews; open 24/7.
Best for emergencies (open 24/7): Air Comfort Service Inc., posts 24/7 hours; ranked #4 of 46.
Most-reviewed: Moxie Pest Control, 3,165 Google reviews at 4.6★, the most of 46 ranked; ranked #21.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
46 Saint Peters insulation contractors are ranked here by CR Score, from ten published factors. 11 are open 24/7, 21 open Saturdays and 17 open Sundays, based on posted hours. The median Google rating is 4.9★ across 46 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | iFOAM Insulation of O'Fallon | 62 | 5.0★ (113) | O'Fallon, 5 mi away | 24/7 | Overall |
| 2 | Foam Co. | 62 | 4.9★ (155) | Saint Peters | Sat · Sun | — |
| 3 | Buckingham Pest Control | 62 | 5.0★ (937) | Saint Peters | — | — |
| 4 | Air Comfort Service Inc. | 61 | 5.0★ (1,159) | Saint Peters | 24/7 | Emergencies |
| 5 | West County Insulation | 61 | 5.0★ (129) | St. Louis, 12 mi away | 24/7 | — |
| 6 | Addict Insulation, LLC | 60 | 4.6★ (159) | Saint Peters | Sat · Sun · Evenings | — |
| 7 | Bone Dry Roofing | 58 | 4.7★ (575) | Saint Peters | 24/7 | — |
| 8 | Air Comfort Service, Inc. | 58 | 4.9★ (2,041) | Hazelwood, 13 mi away | 24/7 | — |
| 9 | Bug Out | 58 | 5.0★ (185) | Saint Peters | 24/7 | — |
| 10 | Koala Insulation of Gateway West & Metro East IL | 58 | 4.9★ (528) | Bridgeton, 10 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 trade focus: 5.0★ from 113 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters
Ranked #2 because of its Google rating and trade focus: 4.9★ from 155 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters
Ranked #3 because of its Google rating and trade focus: 5.0★ from 937 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters
Ranked #4 because of its Google rating and review volume: 5.0★ from 1,159 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Louis, 12 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 129 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters
Ranked #6 because of its Google rating and trade focus: 4.6★ from 159 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters
Ranked #7 because of its Google rating and review volume: 4.7★ from 575 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hazelwood, 13 mi away
Ranked #8 because of its Google rating and review volume: 4.9★ from 2,041 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters
Ranked #9 because of its Google rating and review volume: 5.0★ from 185 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeton, 10 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 528 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chesterfield, 10 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 160 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in O'Fallon, 4 mi away
Ranked #12 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 Wildwood, 23 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 278 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters
Ranked #14 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters
Ranked #15 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 Warrenton, 16 mi away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 86 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Saint Peters
Ranked #17 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in O'Fallon, 5 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 69 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Valley Park, 19 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 175 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chesterfield, 10 mi away
Ranked #20 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 Bridgeton, 11 mi away
Ranked #21 because of its Google rating and review volume: 4.6★ from 3,165 Google reviews, the most in Saint Peters.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Berkeley, 16 mi away
Ranked #22 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 Saint Peters
Ranked #23 because of its Google rating and trade focus: 4.2★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Charles, 4 mi away
Ranked #24 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 Saint Charles, 7 mi away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 14 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 Saint Peters. 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 46 Saint Peters 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 Saint Peters 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 |