33 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Thorold: NOCO Residential: HVAC, Fuels, and Energy, CR Score 83/100; 4.8★ from 440 Google reviews; open 24/7.
Best for emergencies (open 24/7): Ace 1 Quality Roofing | Siding, Eavestroughs, Roofing - St. Catharines, posts 24/7 hours; ranked #5 of 33.
Most-reviewed: Stellar Roofing - Buffalo, 446 Google reviews at 4.7★, the most of 33 ranked; ranked #20.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
33 Thorold insulation contractors are ranked here by CR Score, from 8 published factors. 3 are open 24/7, 10 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 4.7★ across 33 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | NOCO Residential: HVAC, Fuels, and Energy | 83 | 4.8★ (440) | Tonawanda, 33 km away | 24/7 | Overall |
| 2 | Ace 1 Quality Roofing Siding & Eavestroughs / Niagara | 82 | 5.0★ (104) | Niagara Falls, 9 km away | Sat · Sun · Evenings | — |
| 3 | USA Insulation of Buffalo | 80 | 4.6★ (310) | Fort Erie, 37 km away | Sat | — |
| 4 | Belle-Mia Insulation | 78 | 4.9★ (53) | Niagara Falls, 9 km away | — | — |
| 5 | Ace 1 Quality Roofing | Siding, Eavestroughs, Roofing - St. Catharines | 78 | 5.0★ (8) | St. Catharines, 10 km away | 24/7 | Emergencies |
| 6 | Niagara Environmental Dynamics Ltd | 78 | 4.8★ (20) | Port Colborne, 22 km away | Sat | — |
| 7 | Total Comfort Spray Foam | 78 | 4.5★ (44) | Thorold | — | — |
| 8 | USA Insulation of Grand Rapids | 77 | 4.4★ (111) | Forest Hills, 10 km away | — | — |
| 9 | Great Lakes Spray Foam Insulation LLC | 77 | 4.7★ (15) | Grand Island, 40 km away | Sat · Sun · Evenings | — |
| 10 | Niagara Commercial Coatings & Insulation | 77 | 5.0★ (4) | Niagara Falls, 11 km away | — | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and availability: 4.8★ from 440 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 9 km away
Ranked #2 because of its Google rating and review volume: 5.0★ from 104 Google reviews, 104 Google reviews.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 37 km away
Ranked #3 because of its Google rating and trade focus: 4.6★ from 310 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 9 km away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 53 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 10 km away
Ranked #5 because of its Google rating and availability: 5.0★ from 8 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Port Colborne, 22 km away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 20 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thorold
Ranked #7 because of its Google rating and trade focus: 4.5★ from 44 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Forest Hills, 10 km away
Ranked #8 because of its Google rating and trade focus: 4.4★ from 111 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Grand Island, 40 km away
Ranked #9 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 11 km away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Tonawanda, 27 km away
Ranked #11 because of its Google rating and trade focus: 3.8★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Tonawanda, 29 km away
Ranked #12 because of its Google rating and trade focus: 3.8★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 5 km away
Ranked #13 because of its Google rating and trade focus: 4.2★ from 45 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines, 6 km away
Ranked #14 because of its Google rating and trade focus: 4.3★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Thorold
Ranked #15 because of its Google rating and trade focus: 3.7★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 32 km away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 35 km away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Tonawanda, 28 km away
Ranked #18 because of its Google rating and trade focus: 4.7★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 30 km away
Ranked #19 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 33 km away
Ranked #20 because of its Google rating and review volume: 4.7★ from 446 Google reviews, the most Google reviews on this list (446).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 14 km away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Fort Erie, 27 km away
Ranked #22 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 31 km away
Ranked #23 because of its Google rating and trade focus: 4.2★ from 30 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in North Tonawanda, 28 km away
Ranked #24 because of its Google rating and trade focus: 4.1★ from 21 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Kenmore, 32 km away
Ranked #25 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
#1 to #25 are shown in full above. Here are #26 to #33, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | A1 Insulation & Coating | 68 | 3.5★ (6) | 32 km |
| 27 | Superior Thermal Systems | 68 | 5.0★ (3) | 31 km |
| 28 | Local Crafters Construction LLC | 67 | 5.0★ (22) | 25 km |
| 29 | Ecotech Insulation Solutions Inc. | 66 | 3.2★ (12) | 39 km |
| 30 | Thermal Foams, Inc. | 64 | 4.2★ (15) | 30 km |
| 31 | NOCO Commercial: HVAC, Fuels, and Energy | 63 | 5.0★ (8) | 33 km |
| 32 | Seibold Construction Inc. t.a. "Leak Master" | 63 | 4.4★ (17) | 40 km |
| 33 | NOCO HVAC, Fuels, and Energy | 60 | 3.3★ (11) | 40 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 | 21 km | |
| Advance Insulation Systems | 5.0★ (1) | 8 km |
| Big Blue Insulation | 13 km | |
| Frontier Insulation Contractors Inc | 4.0★ (2) | 31 km |
| Go Green Insulation Co | 18 km | |
| Jerry's Insulating Co | 5.0★ (1) | 38 km |
| Kyle Collins Waterproofing | In Thorold | |
| Losier Insulation | 5.0★ (1) | In Thorold |
| Metal Insulations Ltd | 9 km | |
| Mike's Insulation | 5.0★ (1) | In Thorold |
| Miner Insulation | 33 km | |
| MKM Insulation Contractor of Buffalo NY | 35 km | |
| NOCO HVAC, Fuels, and Energy | 27 km | |
| Peninsula Spray Foam | 13 km | |
| PIROLLI'S PROFESSIONAL PAINTING | 21 km | |
| Platinum Roofing & Exteriors | Niagara and St. Catharines | In Thorold | |
| RIBCO Inc. | 5.0★ (2) | 33 km |
| Stamford Insulation | 19 km | |
| Superior Insulation Services Inc. | 4.5★ (2) | 6 km |
| Unifrax Sanborn Ny | 5.0★ (1) | 21 km |
US national ranges converted to CAD, not adjusted for Thorold. 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 33 Thorold 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 Thorold 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 |