695 roofers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in St. Catharines: AJT Roofing and Contracting, CR Score 92/100; 4.9★ from 190 Google reviews; open 24/7.
Best for emergencies (open 24/7): Niagara RoofMasters, posts 24/7 hours; ranked #2 of 695.
Most-reviewed: D'Angelo and Sons | Eavestrough Repair & Roofing Hamilton, 1,438 Google reviews at 4.6★, the most of 695 ranked; ranked #13.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
695 St. Catharines roofers are ranked here by CR Score, from 8 published factors. 157 are open 24/7, 459 open Saturdays and 292 open Sundays, based on posted hours. The median Google rating is 4.9★ across 695 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | AJT Roofing and Contracting | 92 | 4.9★ (190) | St. Catharines | 24/7 | Overall |
| 2 | Niagara RoofMasters | 92 | 4.8★ (343) | Welland, 12 km away | 24/7 | Emergencies |
| 3 | Niagara RoofMasters | Roofing St. Catharines | 90 | 4.8★ (73) | St. Catharines | 24/7 | — |
| 4 | ROOF WIZARD INC | 90 | 5.0★ (79) | Niagara Falls, 15 km away | 24/7 | — |
| 5 | Buffalo's Best Roofing Company LLC | 89 | 4.9★ (576) | Cheektowaga, 50 km away | 24/7 | — |
| 6 | OConnor Contracting | 89 | 4.9★ (268) | Buffalo, 39 km away | 24/7 | — |
| 7 | King Remodeling Corp roofing contractor | 89 | 5.0★ (177) | Buffalo, 42 km away | 24/7 | — |
| 8 | Green Peaks Roofing | 88 | 5.0★ (161) | Hamilton, 43 km away | 24/7 | — |
| 9 | Buffalo Roofing | 88 | 4.8★ (379) | Williamsville, 48 km away | 24/7 | — |
| 10 | Graves Brothers Home Improvement | 88 | 4.7★ (494) | Williamsville, 50 km away | 24/7 | — |
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: 4.9★ from 190 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Welland, 12 km away
Ranked #2 because of its Google rating and availability: 4.8★ from 343 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in St. Catharines
Ranked #3 because of its Google rating and availability: 4.8★ from 73 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 15 km away
Ranked #4 because of its Google rating and availability: 5.0★ from 79 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Cheektowaga, 50 km away
Ranked #5 because of its Google rating and availability: 4.9★ from 576 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 39 km away
Ranked #6 because of its Google rating and availability: 4.9★ from 268 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 42 km away
Ranked #7 because of its Google rating and availability: 5.0★ from 177 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hamilton, 43 km away
Ranked #8 because of its Google rating and availability: 5.0★ from 161 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Williamsville, 48 km away
Ranked #9 because of its Google rating and availability: 4.8★ from 379 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Williamsville, 50 km away
Ranked #10 because of its Google rating and availability: 4.7★ from 494 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 16 km away
Ranked #11 because of its Google rating and availability: 4.8★ from 50 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 39 km away
Ranked #12 because of its Google rating and availability: 5.0★ from 87 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Ancaster, 64 km away
Ranked #13 because of its Google rating and review volume: 4.6★ from 1,438 Google reviews, the most Google reviews on this list (1,438).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Niagara Falls, 15 km away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 104 Google reviews, listed on Google as “Roofing contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in North Tonawanda, 36 km away
Ranked #15 because of its Google rating and availability: 4.9★ from 80 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Buffalo, 44 km away
Ranked #16 because of its Google rating and availability: 4.8★ from 129 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Mississauga, 56 km away
Ranked #17 because of its Google rating and availability: 5.0★ from 124 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hamilton, 45 km away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 766 Google reviews, listed on Google as “Roofing contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in North York, 62 km away
Ranked #19 because of its Google rating and availability: 4.9★ from 212 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Milton, 63 km away
Ranked #20 because of its Google rating and availability: 5.0★ from 156 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Mississauga, 61 km away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 625 Google reviews, listed on Google as “Roofing contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Norfolk County, 61 km away
Ranked #22 because of its Google rating and availability: 5.0★ from 131 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Toronto, 57 km away
Ranked #23 because of its Google rating and availability: 4.9★ from 143 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Hamilton, 51 km away
Ranked #24 because of its Google rating and availability: 4.8★ from 146 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Toronto, 58 km away
Ranked #25 because of its Google rating and availability: 4.9★ from 143 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
#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 695 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 |
|---|---|---|
| A J Roofing | 5.0★ (1) | In St. Catharines |
| Alpha Co | 1.0★ (1) | In St. Catharines |
| Approved Roofers | 4.8★ (46) | 53 km |
| BROUWER CONSTRUCTION (1981) LTD | 5.0★ (6) | In St. Catharines |
| Complete Casa Construction | 5.0★ (21) | In St. Catharines |
| Custom Contracting Roofing & Eavestrough Repair | 4.5★ (108) | 50 km |
| Earl Contracting Corporation | 5.0★ (2) | In St. Catharines |
| ELITE EXTERIORS & EAVESTROUGH | 4.9★ (61) | In St. Catharines |
| Gorilla Property Services | 5.0★ (7) | In St. Catharines |
| Joe Shultz Waterproofing | 5.0★ (4) | In St. Catharines |
| L & L Contracting Inc. | 5.0★ (22) | In St. Catharines |
| McMillan Waterproofing Niagara | 5.0★ (51) | In St. Catharines |
| Metal Roofing by Hindrea | 5.0★ (2) | In St. Catharines |
| Respectable Roofers Inc | 5.0★ (2) | In St. Catharines |
| ROOF FOR LIFE INC. | 4.8★ (82) | 63 km |
| Seal-Tite Quality Concrete | 5.0★ (10) | In St. Catharines |
| Thermosun By Franks Remodeling | 2.0★ (2) | In St. Catharines |
| TS Metal Roofing | 5.0★ (1) | In St. Catharines |
| X Contracting Group INC. | 4.9★ (61) | In St. Catharines |
| XOA construction | 4.9★ (45) | 55 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 |
|---|---|---|---|---|---|
| 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 695 St. Catharines roofers 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 St. Catharines 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 |