32 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in St. Catharines: Belle-Mia Insulation, CR Score 56/100; 4.9★ from 53 Google reviews.
Best for emergencies (open 24/7): NOCO Residential: HVAC, Fuels, and Energy, posts 24/7 hours; ranked #5 of 32.
Most-reviewed: Stellar Roofing - Buffalo, 446 Google reviews at 4.7★, the most of 32 ranked; ranked #18.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
32 St. Catharines insulation contractors are ranked here by CR Score, from ten published factors. 3 are open 24/7, 9 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 4.8★ across 32 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Belle-Mia Insulation | 56 | 4.9★ (53) | Niagara Falls, 14 km away | — | Overall |
| 2 | Moore Insulation (A Division of GNI) | 56 | 4.2★ (45) | St. Catharines | — | — |
| 3 | Jerry's Insulating Co | 55 | 4.3★ (35) | St. Catharines | — | — |
| 4 | USA Insulation of Grand Rapids | 55 | 4.4★ (111) | Forest Hills, 16 km away | — | — |
| 5 | NOCO Residential: HVAC, Fuels, and Energy | 55 | 4.8★ (440) | Tonawanda, 39 km away | 24/7 | Emergencies |
| 6 | Ace 1 Quality Roofing Siding & Eavestroughs / Niagara | 55 | 5.0★ (104) | Niagara Falls, 15 km away | Sat · Sun · Evenings | — |
| 7 | Total Comfort Spray Foam | 55 | 4.5★ (44) | Thorold, 11 km away | — | — |
| 8 | Combat Foam Insulation Inc | 53 | 5.0★ (18) | Norfolk County, 38 km away | Sat · Sun · Evenings | — |
| 9 | Niagara Environmental Dynamics Ltd | 53 | 4.8★ (20) | Port Colborne, 28 km away | Sat | — |
| 10 | Wooly Insulation Inc | 53 | 4.8★ (85) | Hamilton, 37 km 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: 4.9★ from 53 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Catharines
Ranked #2 because of its Google rating and trade focus: 4.2★ from 45 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Catharines
Ranked #3 because of its Google rating and trade focus: 4.3★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Forest Hills, 16 km away
Ranked #4 because of its Google rating and trade focus: 4.4★ from 111 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Tonawanda, 39 km away
Ranked #5 because of its Google rating and review volume: 4.8★ from 440 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Niagara Falls, 15 km away
Ranked #6 because of its Google rating and review volume: 5.0★ from 104 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thorold, 11 km away
Ranked #7 because of its Google rating and trade focus: 4.5★ from 44 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norfolk County, 38 km away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 18 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Port Colborne, 28 km away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hamilton, 37 km away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 85 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in St. Catharines
Ranked #11 because of its Google rating and availability: 5.0★ from 8 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Niagara Falls, 18 km away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Thorold, 6 km away
Ranked #13 because of its Google rating and trade focus: 3.7★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Brant, 38 km away
Ranked #14 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 Tonawanda, 34 km away
Ranked #15 because of its Google rating and trade focus: 4.7★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Tonawanda, 33 km away
Ranked #16 because of its Google rating and trade focus: 3.8★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Tonawanda, 35 km away
Ranked #17 because of its Google rating and trade focus: 3.8★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Buffalo, 38 km away
Ranked #18 because of its Google rating and review volume: 4.7★ from 446 Google reviews, the most in St. Catharines.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Niagara Falls, 34 km away
Ranked #19 because of its Google rating and trade focus: 4.2★ from 30 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Niagara Falls, 19 km away
Ranked #20 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 Fort Erie, 33 km away
Ranked #21 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Tonawanda, 34 km away
Ranked #22 because of its Google rating and trade focus: 4.1★ from 21 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fort Erie, 39 km away
Ranked #23 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 Kenmore, 38 km 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 Burlington, 34 km away
Ranked #25 because of its Google rating and trade focus: 3.2★ from 12 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #32, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | A1 Insulation & Coating | 47 | 3.5★ (6) | 39 km |
| 27 | Superior Thermal Systems | 46 | 5.0★ (3) | 37 km |
| 28 | Pro Insul Limited | 46 | 5.0★ (3) | 39 km |
| 29 | Caspi Service Group of Fort Erie | 45 | 5.0★ (3) | 37 km |
| 30 | Local Crafters Construction LLC | 45 | 5.0★ (22) | 31 km |
| 31 | Thermal Foams, Inc. | 42 | 4.2★ (15) | 37 km |
| 32 | NOCO Commercial: HVAC, Fuels, and Energy | 42 | 5.0★ (8) | 39 km |
20 more insulation contractors within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Advance Insulation | 26 km | |
| Advance Insulation Systems | 5.0★ (1) | 10 km |
| Altra Drywall & Acoustics | In St. Catharines | |
| Big Blue Insulation | 14 km | |
| Enersystem Insulation Limited | 5.0★ (2) | 38 km |
| Frontier Insulation Contractors Inc | 4.0★ (2) | 37 km |
| Go Green Insulation Co | 23 km | |
| Jerry's Insulating Co | 5.0★ (1) | 34 km |
| Losier Insulation | 5.0★ (1) | 6 km |
| Metal Insulations Ltd | 15 km | |
| Mike's Insulation | 5.0★ (1) | 9 km |
| Miner Insulation | 39 km | |
| NOCO HVAC, Fuels, and Energy | 34 km | |
| Peninsula Spray Foam | 14 km | |
| PIROLLI'S PROFESSIONAL PAINTING | 26 km | |
| Platinum Roofing & Exteriors | Niagara and St. Catharines | 6 km | |
| RIBCO Inc. | 5.0★ (2) | 40 km |
| Stamford Insulation | 23 km | |
| Superior Insulation Services Inc. | 4.5★ (2) | In St. Catharines |
| Unifrax Sanborn Ny | 5.0★ (1) | 25 km |
US national ranges converted to CAD, not adjusted for St. Catharines. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | CA$2,390 | CA$2,950 | CA$3,510 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 32 St. Catharines 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 St. Catharines 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 |