268 siding contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Thorold: 4wards Exteriors | Siding, Eavestrough & Roofing | Windows & Doors, CR Score 90/100; 5.0★ from 64 Google reviews; open 24/7.
Best for emergencies (open 24/7): Junior Exteriors, posts 24/7 hours; ranked #2 of 268.
Most-reviewed: Gerry's Roofing & Siding Inc, 766 Google reviews at 4.8★, the most of 268 ranked; ranked #16.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
268 Thorold siding contractors are ranked here by CR Score, from 8 published factors. 46 are open 24/7, 160 open Saturdays and 78 open Sundays, based on posted hours. The median Google rating is 4.8★ across 268 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | 4wards Exteriors | Siding, Eavestrough & Roofing | Windows & Doors | 90 | 5.0★ (64) | Welland, 14 km away | 24/7 | Overall |
| 2 | Junior Exteriors | 89 | 5.0★ (94) | North Tonawanda, 29 km away | 24/7 | Emergencies |
| 3 | 4wards Exteriors Inc | Siding, Eavestrough & Roofing | Windows & Doors | 88 | 4.7★ (28) | St. Catharines, 6 km away | 24/7 | — |
| 4 | Ace 1 Quality Roofing | Siding, Eavestroughs, Roofing - St. Catharines | 85 | 5.0★ (8) | St. Catharines, 10 km away | 24/7 | — |
| 5 | Envirotech Exteriors inc. | 85 | 4.7★ (39) | Burlington, 39 km away | 24/7 | — |
| 6 | HomeVision Roofing & Siding | 85 | 5.0★ (243) | Mississauga, 64 km away | 24/7 | — |
| 7 | Ace 1 Quality Roofing Siding & Eavestroughs / Niagara | 84 | 5.0★ (104) | Niagara Falls, 9 km away | Sat · Sun · Evenings | — |
| 8 | ROOF WIZARD INC | 84 | 5.0★ (79) | Niagara Falls, 9 km away | 24/7 | — |
| 9 | 4wards Exteriors Inc | Siding, Eavestrough & Roofing | Windows & Doors | 84 | 4.0★ (4) | Thorold | 24/7 | — |
| 10 | Exterior Xperts | 84 | 5.0★ (57) | St. Catharines, 3 km away | Sat | — |
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 in Thorold
Based in Welland, 14 km away
Ranked #1 because of its Google rating and availability: 5.0★ from 64 Google reviews, open 24/7.
Based in North Tonawanda, 29 km away
Ranked #2 because of its Google rating and availability: 5.0★ from 94 Google reviews, open 24/7.
Based in St. Catharines, 6 km away
Ranked #3 because of its Google rating and availability: 4.7★ from 28 Google reviews, open 24/7.
Based in St. Catharines, 10 km away
Ranked #4 because of its Google rating and availability: 5.0★ from 8 Google reviews, open 24/7.
Based in Burlington, 39 km away
Ranked #5 because of its Google rating and availability: 4.7★ from 39 Google reviews, open 24/7.
Based in Mississauga, 64 km away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 243 Google reviews, listed on Google as “Siding contractor”.
Based in Niagara Falls, 9 km away
Ranked #7 because of its Google rating and availability: 5.0★ from 104 Google reviews, open 7 days a week.
Based in Niagara Falls, 9 km away
Ranked #8 because of its Google rating and availability: 5.0★ from 79 Google reviews, open 24/7.
Based in Thorold
Ranked #9 because of its Google rating and availability: 4.0★ from 4 Google reviews, open 24/7.
Based in St. Catharines, 3 km away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 57 Google reviews, listed on Google as “Siding contractor”.
Based in Buffalo, 33 km away
Ranked #11 because of its Google rating and availability: 4.9★ from 268 Google reviews, open 24/7.
Based in Hamilton, 43 km away
Ranked #12 because of its Google rating and availability: 5.0★ from 20 Google reviews, open 24/7.
Based in Lancaster, 56 km away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 160 Google reviews, listed on Google as “Siding contractor”.
Based in Buffalo, 36 km away
Ranked #14 because of its Google rating and availability: 5.0★ from 177 Google reviews, open 24/7.
Based in St. Catharines, 9 km away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 17 Google reviews, listed on Google as “Siding contractor”.
Based in Hamilton, 50 km away
Ranked #16 because of its Google rating and review volume: 4.8★ from 766 Google reviews, the most Google reviews on this list (766).
Based in Mississauga, 63 km away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 114 Google reviews, listed on Google as “Siding contractor”.
Based in Williamsville, 43 km away
Ranked #18 because of its Google rating and availability: 4.8★ from 379 Google reviews, open 24/7.
Based in Burlington, 52 km away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 69 Google reviews, listed on Google as “Siding contractor”.
Based in Niagara Falls, 16 km away
Ranked #20 because of its Google rating and trade focus: 4.5★ from 33 Google reviews, listed on Google as “Siding contractor”.
Based in Fort Erie, 13 km away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “Siding contractor”.
Based in Williamsville, 44 km away
Ranked #22 because of its Google rating and availability: 4.7★ from 494 Google reviews, open 24/7.
Based in Hamilton, 46 km away
Ranked #23 because of its Google rating and availability: 5.0★ from 161 Google reviews, open 24/7.
Based in Etobicoke, 62 km away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 292 Google reviews, listed on Google as “Siding contractor”.
Based in Burlington, 48 km away
Ranked #25 because of its Google rating and availability: 4.4★ from 20 Google reviews, open 24/7.
#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 268 ranked siding contractors here; the rest are on their profiles.
20 more siding contractors 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 |
|---|---|---|
| 4wards Exteriors Inc | Siding, Eavestrough & Roofing | Windows & Doors | 5.0★ (2) | 11 km |
| A 1 Siding & Windows Niagara Ltd. | In Thorold | |
| Ace 1 Quality Roofing | Siding, Eavestroughs & Roofing Welland | 5.0★ (2) | 13 km |
| Ace 1 quality roofing Siding & Eavestroughs Fort Erie | 5.0★ (2) | 30 km |
| Baron Roofing | 4.8★ (19) | In Thorold |
| Bingley Windows Siding & Roofing | 3.0★ (2) | 13 km |
| DA Contracting Ltd | 5.0★ (1) | In Thorold |
| Devine's Complete Home Improvement | 3.0★ (2) | 31 km |
| Fair Home Improvement | 3.0★ (2) | 39 km |
| K Plugers Siding | 5.0★ (2) | 14 km |
| Legends Building Group | 3.9★ (7) | In Thorold |
| Platinum Roofing & Exteriors | Niagara and St. Catharines | In Thorold | |
| Preferred Home Improvement Inc | 3.5★ (2) | 42 km |
| Remodel WNY | 5.0★ (2) | 41 km |
| Shamrock Construction | 5.0★ (2) | 33 km |
| Sleeth Siding and Windows | 5.0★ (2) | 36 km |
| Thompson Roofing Siding | 3.0★ (2) | 29 km |
| Tremblay Seamless Eavestroughing | In Thorold | |
| TS Metal Roofing | In Thorold | |
| Welland Roofing and Siding | 5.0★ (2) | 8 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 |
|---|---|---|---|---|---|
| Siding replacement | CA$7,810 | CA$16,290 | CA$24,910 | Per house: typical range of customer-reported projects. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 268 Thorold siding 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 |