545 roofers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Thorold: Niagara RoofMasters, CR Score 65/100; 4.8★ from 343 Google reviews; open 24/7.
Best for emergencies (open 24/7): AJT Roofing and Contracting, posts 24/7 hours; ranked #2 of 545.
Most-reviewed: Gerry's Roofing & Siding Inc, 766 Google reviews at 4.8★, the most of 545 ranked; ranked #14.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
545 Thorold roofers are ranked here by CR Score, from ten published factors. 111 are open 24/7, 344 open Saturdays and 214 open Sundays, based on posted hours. The median Google rating is 4.8★ across 545 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Niagara RoofMasters | 65 | 4.8★ (343) | Welland, 7 km away | 24/7 | Overall |
| 2 | AJT Roofing and Contracting | 65 | 4.9★ (190) | St. Catharines, 8 km away | 24/7 | Emergencies |
| 3 | Buffalo's Best Roofing Company LLC | 63 | 4.9★ (576) | Cheektowaga, 44 km away | 24/7 | — |
| 4 | ROOF WIZARD INC | 63 | 5.0★ (79) | Niagara Falls, 9 km away | 24/7 | — |
| 5 | OConnor Contracting | 63 | 4.9★ (268) | Buffalo, 33 km away | 24/7 | — |
| 6 | Niagara RoofMasters | Roofing St. Catharines | 63 | 4.8★ (73) | St. Catharines, 6 km away | 24/7 | — |
| 7 | King Remodeling Corp roofing contractor | 62 | 5.0★ (177) | Buffalo, 36 km away | 24/7 | — |
| 8 | Ace 1 Quality Roofing Siding & Eavestroughs / Niagara | 62 | 5.0★ (104) | Niagara Falls, 9 km away | Sat · Sun · Evenings | — |
| 9 | Buffalo Roofing | 62 | 4.8★ (379) | Williamsville, 43 km away | 24/7 | — |
| 10 | Graves Brothers Home Improvement | 62 | 4.7★ (494) | Williamsville, 44 km away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 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: 4.8★ from 343 Google reviews, listed on Google as “Roofing contractor”.
Based in St. Catharines, 8 km away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 190 Google reviews, listed on Google as “Roofing contractor”.
Based in Cheektowaga, 44 km away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 576 Google reviews, listed on Google as “Roofing contractor”.
Based in Niagara Falls, 9 km away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 79 Google reviews, listed on Google as “Roofing contractor”.
Based in Buffalo, 33 km away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 268 Google reviews, listed on Google as “Roofing contractor”.
Based in St. Catharines, 6 km away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 73 Google reviews, listed on Google as “Roofing contractor”.
Based in Buffalo, 36 km away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 177 Google reviews, listed on Google as “Roofing contractor”.
Based in Niagara Falls, 9 km away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 104 Google reviews, listed on Google as “Roofing contractor”.
Based in Williamsville, 43 km away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 379 Google reviews, listed on Google as “Roofing contractor”.
Based in Williamsville, 44 km away
Ranked #10 because of its Google rating and trade focus: 4.7★ from 494 Google reviews, listed on Google as “Roofing contractor”.
Based in Niagara Falls, 11 km away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 50 Google reviews, listed on Google as “Roofing contractor”.
Based in Buffalo, 33 km away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 87 Google reviews, listed on Google as “Roofing contractor”.
Based in Hamilton, 46 km away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 161 Google reviews, listed on Google as “Roofing contractor”.
Based in Hamilton, 50 km away
Ranked #14 because of its Google rating and review volume: 4.8★ from 766 Google reviews, the most in Thorold.
Based in North Tonawanda, 31 km away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 80 Google reviews, listed on Google as “Roofing contractor”.
Based in Niagara Falls, 7 km away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 117 Google reviews, listed on Google as “Roofing contractor”.
Based in Buffalo, 38 km away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 129 Google reviews, listed on Google as “Roofing contractor”.
Based in Buffalo, 31 km away
Ranked #18 because of its Google rating and trade focus: 4.6★ from 123 Google reviews, listed on Google as “Roofing contractor”.
Based in Welland, 14 km away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 53 Google reviews, listed on Google as “Roofing contractor”.
Based in Thorold
Ranked #20 because of its Google rating and trade focus: 4.6★ from 11 Google reviews, listed on Google as “Roofing contractor”.
Based in Buffalo, 34 km away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 116 Google reviews, listed on Google as “Roofing contractor”.
Based in North York, 43 km away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 165 Google reviews, listed on Google as “Roofing contractor”.
Based in Toronto, 61 km away
Ranked #23 because of its Google rating and trade focus: 4.5★ from 574 Google reviews, listed on Google as “Roofing contractor”.
Based in Ancaster, 59 km away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 266 Google reviews, listed on Google as “Roofing contractor”.
Based in Buffalo, 49 km away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 84 Google reviews, listed on Google as “Roofing contractor”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 545 ranked roofers here; the rest are on their profiles.
20 more roofers within 64 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 |
|---|---|---|
| All-Pro Waterproofing & Excavating Inc | In Thorold | |
| Approved Roofers | 4.8★ (46) | 60 km |
| BB’s Regional Roofing and Siding CO. | 4.9★ (13) | 16 km |
| Better Roofing | 5.0★ (2) | 11 km |
| Earl Contracting Corporation | 5.0★ (2) | 5 km |
| HomeVision Roofing & Siding | 5.0★ (243) | 64 km |
| Kyle Collins Waterproofing | In Thorold | |
| Leave It To Me | In Thorold | |
| Metal Roofing by Hindrea | 5.0★ (2) | 5 km |
| Platinum Roofing & Exteriors | Niagara and St. Catharines | In Thorold | |
| Rankin Construction Inc | 1.0★ (1) | In Thorold |
| Respectable Roofers Inc | 5.0★ (2) | 6 km |
| Roofers Niagara | 5.0★ (2) | 9 km |
| Rooter-Man Plumbing & Waterproofing Thorold | In Thorold | |
| Rs Roofing & home renovations | In Thorold | |
| Sikkens Paving (division of Sikkens Construction) | 5.0★ (24) | In Thorold |
| Skycrest Roofing Experts | 4.8★ (42) | 61 km |
| Stellar Roofing | 4.8★ (26) | 53 km |
| Thrifty Roofs | 4.3★ (70) | 46 km |
| TS Metal Roofing | In Thorold |
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 |
|---|---|---|---|---|---|
| Roof replacement | CA$10,540 | CA$14,050 | CA$19,680 | Per project: asphalt shingles on a 1,700 sq ft home (about 2,000 sq ft of roof). US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
| Roof repair | CA$560 | CA$1,650 | CA$2,770 | Per repair: typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
In Ontario, roofers are busiest from late spring to early fall, when shingles can be installed in mild, dry weather. After a big storm, get more than one quote and check the license or registration before signing.
We scored 545 Thorold roofers 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 Thorold 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 |