8 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Union: Buckingham Pest Control, CR Score 60/100; 5.0★ from 278 Google reviews; open Saturdays until 12 PM.
Best for emergencies (open 24/7): Genuine Contracting, posts 24/7 hours; ranked #3 of 8.
Most-reviewed: Addict Insulation, LLC, 159 Google reviews at 4.6★, the most of 8 ranked after Buckingham Pest Control; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
8 Union insulation contractors are ranked here by CR Score, from ten published factors. 1 is open 24/7, 4 open Saturdays and 3 open Sundays, based on posted hours. The median Google rating is 4.7★ across 8 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Buckingham Pest Control | 60 | 5.0★ (278) | Wildwood, 20 mi away | Sat | Overall |
| 2 | Addict Insulation, LLC | 58 | 4.6★ (159) | Saint Peters, 23 mi away | Sat · Sun · Evenings | Most reviews |
| 3 | Genuine Contracting | 54 | 5.0★ (39) | Pacific, 15 mi away | 24/7 | Emergencies |
| 4 | Extreme Spray Foam of St. Louis | 53 | 5.0★ (25) | Saint Peters, 18 mi away | — | — |
| 5 | Thermaltech, Inc. | 50 | 2.3★ (3) | Washington, 8 mi away | — | — |
| 6 | Walrus Rock Construction L.L.C. | 50 | 4.8★ (19) | East Saint Louis, 16 mi away | Sat · Sun · Evenings | — |
| 7 | Con-Tech Insulation LLC | 49 | 3.5★ (19) | Eureka, 21 mi away | — | — |
| 8 | Thurmond Brothers Construction | 43 | 2.6★ (5) | Sullivan, 19 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 278 Google reviews, the most in Union.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 23 mi away
Ranked #2 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 Pacific, 15 mi away
Ranked #3 because of its Google rating and review volume: 5.0★ from 39 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Saint Peters, 18 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 Washington, 8 mi away
Ranked #5 because of its Google rating and trade focus: 2.3★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Saint Louis, 16 mi away
Ranked #6 because of its Google rating and review volume: 4.8★ from 19 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Eureka, 21 mi away
Ranked #7 because of its Google rating and trade focus: 3.5★ from 19 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sullivan, 19 mi away
Ranked #8 because of its Google rating and trade focus: 2.6★ from 5 Google reviews, listed on Google as “General contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
National price ranges in USD, not adjusted for Union. 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 Union 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 Union 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 |