53/100CR Score
Ranked #1 because of its Google rating and review volume: 4.3★ from 28 Google reviews, the most in Thunder Bay.
- 4.3★ from 28 Google reviews
- Hours
- Mon–Fri 8:30 AM–4 PM · Sat–Sun closed
Best Siding Contractors in Thunder Bay, ON (2026)
5 siding contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Thunder Bay: SRS Windows and Doors Inc., CR Score 53/100; 4.3★ from 28 Google reviews.
- 3
Most-reviewed: Exterior Finishing, 18 Google reviews at 4.1★, the most of 5 ranked after SRS Windows and Doors Inc.; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
5 Thunder Bay siding contractors are ranked here by CR Score, from ten published factors. The median Google rating is 5.0★ across 5 rated businesses.
Top 5 siding contractors in Thunder Bay at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | SRS Windows and Doors Inc. | 53 | 4.3★ (28) | Thunder Bay | — | Overall |
| 2 | CMA Renovations | 53 | 5.0★ (3) | Thunder Bay | Evenings | — |
| 3 | Exterior Finishing | 52 | 4.1★ (18) | Thunder Bay | — | Most reviews |
| 4 | MJM Contracting | 51 | 5.0★ (9) | Thunder Bay | — | — |
| 5 | Thunder Bay Home Improvements | 47 | 5.0★ (3) | Thunder Bay | — | — |
The 5 best siding contractors in Thunder Bay, ranked
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.
Based in Thunder Bay
53/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Siding contractor”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Thu 8 AM–7 PM · Fri 8 AM–5 PM · Sat–Sun closed
Based in Thunder Bay
52/100CR ScoreRanked #3 because of its Google rating and review volume: 4.1★ from 18 Google reviews.
- 4.1★ from 18 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
- Address
- 882 Tungsten St, Thunder Bay, ON P7B 6J3
Based in Thunder Bay
51/100CR ScoreRanked #4 because of its Google rating and review volume: 5.0★ from 9 Google reviews.
- 5.0★ from 9 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
Based in Thunder Bay
47/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Window supplier”.
- 5.0★ from 3 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 219 Kingston St, Thunder Bay, ON P7E 3P6
How much do siding contractors cost in Thunder Bay?
US national ranges converted to CAD, not adjusted for Thunder Bay. 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 |
How we ranked Thunder Bay siding contractors
We scored 5 Thunder Bay siding 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 Thunder Bay 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 |
Siding contractors in Thunder Bay: frequently asked questions
Who is the best siding contractor in Thunder Bay?
By CR Score, the highest-ranked siding contractor in Thunder Bay, ON is SRS Windows and Doors Inc. with a CR Score of 53/100. It has 4.3★ from 28 Google reviews. CMA Renovations (#2) and Exterior Finishing (#3) follow. We ranked 5 siding contractors on ten factors, last updated October 22, 2026.
How many siding contractors are there in Thunder Bay?
ContractorsRanked ranks 5 siding contractors serving Thunder Bay, ON. 5 of them are based in Thunder Bay; the rest serve it from nearby towns. Counts are as of October 2026.
How much does siding replacement cost in Thunder Bay?
Siding replacement typically costs CA$7,810 to CA$24,910, with CA$16,290 typical (Per house: typical range of customer-reported projects. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026)). This is a national range, not adjusted for Thunder Bay. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Thunder Bay siding contractors have?
The median Google rating among 5 rated siding contractors in Thunder Bay is 5.0★, with a median of 9 reviews. SRS Windows and Doors Inc. has the most, 28 reviews, and ranks #1. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank siding contractors?
Each siding contractor gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do siding contractors outside Thunder Bay count in this ranking?
Yes, if they are within 64 km of the Thunder Bay city centre, our service radius for siding contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Can siding contractors pay to rank higher on ContractorsRanked?
No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.
Update log for Thunder Bay
- October 2026: CR Scores recalculated for 5 siding contractors serving Thunder Bay.
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