18 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Waterloo: Goley, Inc., CR Score 79/100; 4.9★ from 240 Google reviews.
Best for emergencies (open 24/7): Bug Out, posts 24/7 hours; ranked #3 of 18.
Most-reviewed: Energy Stars Heating & Cooling Co, 1,175 Google reviews at 4.9★, the most of 18 ranked; ranked #7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
18 Waterloo insulation contractors are ranked here by CR Score, from 8 published factors. 2 are open 24/7, 6 open Saturdays and 4 open Sundays, based on posted hours. The median Google rating is 4.9★ across 18 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Goley, Inc. | 79 | 4.9★ (240) | Columbia, 12 mi away | — | Overall |
| 2 | Koala Insulation of St. Louis | 79 | 4.9★ (430) | St. Louis, 16 mi away | — | — |
| 3 | Bug Out | 79 | 4.9★ (87) | St. Louis, 21 mi away | 24/7 | Emergencies |
| 4 | Foam Engineers - Insulation Experts | 79 | 4.9★ (175) | Valley Park, 24 mi away | Sat | — |
| 5 | Improovy Painters | 77 | 4.7★ (34) | St. Louis, 21 mi away | 24/7 | — |
| 6 | R.A.N. Plaster & Drywall Repair | 76 | 5.0★ (7) | Waterloo | — | — |
| 7 | Energy Stars Heating & Cooling Co | 76 | 4.9★ (1,175) | East Saint Louis, 25 mi away | Sat | Most reviews |
| 8 | Foundation Recovery Systems Downtown St. Louis | 76 | 4.9★ (72) | St. Louis, 21 mi away | Sat · Sun · Evenings | — |
| 9 | Thornburgh Insulation Inc | 74 | 5.0★ (5) | St. Louis, 21 mi away | Sun · Evenings | — |
| 10 | Spray Foam Insulation St. Louis | 74 | 4.9★ (38) | Affton, 20 mi away | — | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 240 Google reviews, listed on Google as “Insulation contractor”.
Based in St. Louis, 16 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 430 Google reviews, listed on Google as “Insulation contractor”.
Based in St. Louis, 21 mi away
Ranked #3 because of its Google rating and availability: 4.9★ from 87 Google reviews, open 24/7.
Based in Valley Park, 24 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 175 Google reviews, listed on Google as “Insulation contractor”.
Based in St. Louis, 21 mi away
Ranked #5 because of its Google rating and availability: 4.7★ from 34 Google reviews, open 24/7.
Based in Waterloo
Ranked #6 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based in East Saint Louis, 25 mi away
Ranked #7 because of its Google rating and review volume: 4.9★ from 1,175 Google reviews, the most Google reviews on this list (1,175).
Based in St. Louis, 21 mi away
Ranked #8 because of its Google rating and availability: 4.9★ from 72 Google reviews, open 7 days a week.
Based in St. Louis, 21 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based in Affton, 20 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 38 Google reviews, listed on Google as “Insulation contractor”.
Based in Belleville, 14 mi away
Ranked #11 because of its Google rating and trade focus: 4.1★ from 28 Google reviews, listed on Google as “Insulation contractor”.
Based in St. Louis, 15 mi away
Ranked #12 because of its Google rating and availability: 4.4★ from 14 Google reviews, open Saturdays until 2 PM.
Based in St. Louis, 19 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based in St. Louis, 20 mi away
Ranked #14 because of its Google rating and trade focus: 3.9★ from 13 Google reviews, listed on Google as “Insulation contractor”.
Based in St. Louis, 18 mi away
Ranked #15 because of its Google rating and review volume: 4.8★ from 131 Google reviews, 131 Google reviews.
Based in St. Louis, 19 mi away
Ranked #16 because of its Google rating and trade focus: 4.3★ from 6 Google reviews, listed on Google as “Roofing contractor”.
Based in East Saint Louis, 18 mi away
Ranked #17 because of its Google rating and trade focus: 3.9★ from 10 Google reviews, listed on Google as “Painter”.
Based in Webster Groves, 21 mi away
Ranked #18 because of its Google rating and trade focus: 2.3★ from 3 Google reviews, listed on Google as “Roofing contractor”.
20 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 |
|---|---|---|
| Acme Fire Proofing & Installation | 5.0★ (1) | 22 mi |
| Bay Insulation of Missouri Inc | 5.0★ (1) | 21 mi |
| Buckley Insulation | 5.0★ (2) | 7 mi |
| Budrovich Mechanical Insulation | 16 mi | |
| Courtney's Heating & Cooling | 23 mi | |
| Green Space Construction | 23 mi | |
| Green Tech Solution LLC | 19 mi | |
| Greenmark Home Performance, LLC | 1.0★ (1) | 20 mi |
| Grizealy Home Remodeling | 22 mi | |
| Insulation Masters Inc | 18 mi | |
| Insulation Masters, Inc. | 23 mi | |
| ISS Insulation Services & Solutions | 21 mi | |
| J Anderson | 14 mi | |
| KB Insulation and Drywall, LLC | 23 mi | |
| M.I.S Insulation | 23 mi | |
| Metro East Overhead Doors | 5.0★ (12) | In Waterloo |
| Sidney Insulation Inc | 5.0★ (1) | 21 mi |
| St. Louis Insulation Pros | 21 mi | |
| United Mechanical Insulation | 16 mi | |
| United Mechanical Insulation | 22 mi |
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 18 Waterloo insulation contractors on 8 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. Unknown factors are left out of the score, 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 | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |