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Best Roofers in Cornwall, ON (2026)

22 roofers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Cornwall: Phil's Reno and Roofing, CR Score 66/100; 4.8★ from 71 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Moreno's Roofing Inc, posts 24/7 hours; ranked #2 of 22.

  3. 3

    Most-reviewed: Garlow Roofing, 85 Google reviews at 4.2★, the most of 22 ranked; ranked #3.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

22 Cornwall roofers are ranked here by CR Score, from ten published factors. 5 are open 24/7, 10 open Saturdays and 7 open Sundays, based on posted hours. The median Google rating is 4.7★ across 22 rated businesses.

Top 10 roofers in Cornwall at a glance

Top 10 roofers in Cornwall at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Phil's Reno and Roofing664.8★ (71)Cornwall24/7Overall
2Moreno's Roofing Inc624.8★ (18)Cornwall24/7Emergencies
3Garlow Roofing614.2★ (85)CornwallSatMost reviews
4WINMAR Cornwall593.8★ (13)Cornwall24/7—
5Real Seal Roofing584.2★ (21)Cornwall——
6Leblanc And Son Roofing584.1★ (13)CornwallSat · Sun—
7Done Right Roofing574.0★ (43)Cornwall——
8William Roach Roofing574.6★ (20)Cornwall——
9Baumann Accurate Roofing575.0★ (5)CornwallSat · Sun · Evenings—
10Eagle Guard Roofing555.0★ (3)Cornwall24/7—

The 22 best roofers in Cornwall, ranked

Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.

  1. Ranked #1 in Cornwall

    #1 Phil's Reno and Roofing

    Based in Cornwall

    66/100CR Score

    Ranked #1 because of its Google rating and trade focus: 4.8★ from 71 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.8★ from 71 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    666 St Felix St, Cornwall, ON K6H 5B6
    View profile for Phil's Reno and Roofing(613) 551-0181

  2. #2 Moreno's Roofing Inc

    Based in Cornwall

    62/100CR Score

    Ranked #2 because of its Google rating and trade focus: 4.8★ from 18 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.8★ from 18 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    17194 Wheeler Rd, St Andrews West, ON K0C 2A0
    View profile for Moreno's Roofing Inc(613) 861-4099

  3. #3 Garlow Roofing

    Based in Cornwall

    61/100CR Score

    Ranked #3 because of its Google rating and review volume: 4.2★ from 85 Google reviews, the most in Cornwall.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.2★ from 85 Google reviews
    Hours
    Mon–Fri 8 AM–6 PM · Sat 8 AM–5 PM · Sun closed
    Address
    Cornwall Island, 20 James Ln, Akwesasne, ON K6H 5R7
    View profile for Garlow Roofing(315) 804-2720

  4. #4 WINMAR Cornwall

    Based in Cornwall

    59/100CR Score

    Ranked #4 because of its Google rating and trade focus: 3.8★ from 13 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 3.8★ from 13 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    3300 Second St E, Cornwall, ON K6H 6M3
    View profile for WINMAR Cornwall(613) 932-0200

  5. #5 Real Seal Roofing

    Based in Cornwall

    58/100CR Score

    Ranked #5 because of its Google rating and trade focus: 4.2★ from 21 Google reviews, listed on Google as “Roofing contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 4.2★ from 21 Google reviews
    View profile for Real Seal Roofing(613) 527-5005

  6. #6 Leblanc And Son Roofing

    Based in Cornwall

    58/100CR Score

    Ranked #6 because of its Google rating and trade focus: 4.1★ from 13 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.1★ from 13 Google reviews
    Hours
    Mon–Sun 7 AM–5 PM
    Address
    313 Fourth St W, Cornwall, ON K6J 2S3
    View profile for Leblanc And Son Roofing(613) 330-1139

  7. #7 Done Right Roofing

    Based in Cornwall

    57/100CR Score

    Ranked #7 because of its Google rating and trade focus: 4.0★ from 43 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.0★ from 43 Google reviews
    Hours
    Mon–Fri 8 AM–4 PM · Sat–Sun closed
    Address
    820 Campbell St, Cornwall, ON K6H 6L7
    View profile for Done Right Roofing(613) 933-2157

  8. #8 William Roach Roofing

    Based in Cornwall

    57/100CR Score

    Ranked #8 because of its Google rating and trade focus: 4.6★ from 20 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.6★ from 20 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat–Sun closed
    Address
    621 Mack St, Cornwall, ON K6K 1R7
    View profile for William Roach Roofing(613) 938-8747

  9. #9 Baumann Accurate Roofing

    Based in Cornwall

    57/100CR Score

    Ranked #9 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 5 Google reviews
    Hours
    Mon–Sat 8 AM–7 PM · Sun 9 AM–5 PM
    Address
    6601 Wine Crescent, Cornwall, ON K6H 7J2
    View profile for Baumann Accurate Roofing(613) 662-1426

  10. #10 Eagle Guard Roofing

    Based in Cornwall

    55/100CR Score

    Ranked #10 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 3 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    View profile for Eagle Guard Roofing(613) 870-1428

  11. #11 First Choice Roofing

    Based in Cornwall

    55/100CR Score

    Ranked #11 because of its Google rating and trade focus: 3.7★ from 7 Google reviews, listed on Google as “Roofing contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 3.7★ from 7 Google reviews
    Address
    103 Fortier St, Cornwall, ON K6J 5L7
    View profile for First Choice Roofing(613) 937-0461

  12. #12 Phil's Renovations

    Based in Cornwall

    55/100CR Score

    Ranked #12 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Roofing contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 5.0★ from 4 Google reviews
    Address
    1105 Cumberland St, Cornwall, ON K6J 4K3
    View profile for Phil's Renovations(613) 938-3533

  13. #13 Amazing Roofing

    Based in Cornwall

    54/100CR Score

    Ranked #13 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Roofing contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 5.0★ from 3 Google reviews
    Address
    405 Belmont St, Cornwall, ON K6H 4Z8
    View profile for Amazing Roofing(613) 363-7081

  14. #14 Arg Roofing

    Based in Cornwall

    53/100CR Score

    Ranked #14 because of its Google rating and trade focus: 3.3★ from 3 Google reviews, listed on Google as “Roofing contractor”.

    Based on 7 of 10 factors; credentials, recency and availability not yet collected.

    • 3.3★ from 3 Google reviews
    Address
    1106 Churchill St, Cornwall, ON K6J 4X8
    View profile for Arg Roofing(613) 571-6676

  17. #17 Cornwall Siding Ltd

    Based in Cornwall

    50/100CR Score

    Ranked #17 because of its Google rating and trade focus: 1.0★ from 3 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 1.0★ from 3 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    6579 Sapphire Dr, Cornwall, ON K6H 7J1
    View profile for Cornwall Siding Ltd(613) 936-8688

  18. #18 J&S Construction

    Based in Potsdam, 42 km away

    50/100CR Score

    Ranked #18 because of its Google rating and trade focus: 1.0★ from 5 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 1.0★ from 5 Google reviews
    Hours
    Mon–Sun 12 PM–12 AM
    Address
    473 NY-11B, Potsdam, NY 13676
    View profile for J&S Construction(315) 261-4659

  19. #19 M.C. Roofing

    Based in Clarence-Rockland, 60 km away

    49/100CR Score

    Ranked #19 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.6★ from 9 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat–Sun closed
    Address
    2484 Devine Rd, Vars, ON K0A 3H0
    View profile for M.C. Roofing(613) 794-6414

  20. #20 G Goyette Roofing Inc.

    Based in Clarence-Rockland, 63 km away

    48/100CR Score

    Ranked #20 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 5.0★ from 7 Google reviews
    Hours
    Mon–Fri 8 AM–9 PM · Sat–Sun closed
    Address
    Alfred and Plantagenet, ON K0B 1A0
    View profile for G Goyette Roofing Inc.(613) 673-8868

  21. #21 Quali-T Eavestrough

    Based in Clarence-Rockland, 61 km away

    48/100CR Score

    Ranked #21 because of its Google rating and trade focus: 4.7★ from 7 Google reviews, listed on Google as “Roofing contractor”.

    Based on 8 of 10 factors; credentials and recency not yet collected.

    • 4.7★ from 7 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat–Sun closed
    Address
    2936 Ritchance Rd, Alfred, ON K0B 1A0
    View profile for Quali-T Eavestrough(613) 808-2333

Also serving Cornwall

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.

Unranked roofers serving Cornwall
BusinessGoogle ratingDistance
Chester Le Clerc Ltd5.0★ (1)In Cornwall
Crack Pro Foundation Repair4.7★ (39)In Cornwall
David Beitz ConstructionIn Cornwall
Denis Bedard's ConstructionIn Cornwall
Dreamweaver home improvement5.0★ (1)51 km
First Choice RoofingIn Cornwall
Fix All ConstructionIn Cornwall
High Ridge RoofingIn Cornwall
Inferno Roofing48 km
Iron Fort Construction & Renovation4.3★ (59)In Cornwall
John Gordon Construction5.0★ (1)In Cornwall
Mark's Quality Painting & Home Improvements4.7★ (14)In Cornwall
Mart's Renovation and RoofingIn Cornwall
Martin's Roofing, And Odd JobsIn Cornwall
Millennial Contracting Inc.4.8★ (43)In Cornwall
Nesbitt Roofing5.0★ (1)In Cornwall
Perras Distefano Construction & Design Services5.0★ (3)In Cornwall
Real Seal RoofingIn Cornwall
SLG RenovationsIn Cornwall
Toiture Proulx3.0★ (2)64 km

How much do roofers cost in Cornwall?

US national ranges converted to CAD, not adjusted for Cornwall. Each row names its basis and the month we checked it.

How much do roofers cost in Cornwall?
JobLowTypicalHighBasisChecked
Roof replacementCA$10,540CA$14,050CA$19,680Per 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 repairCA$560CA$1,650CA$2,770Per 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

When to hire a roofer in Ontario

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.

How we ranked Cornwall roofers

We scored 22 Cornwall 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Cornwall data
Reputation25%Google star rating, adjusted for how many reviews back itMeasured
Credentials15%Active state license, bond and workers’ comp on fileNot yet collected
Review volume10%Number of Google reviews, compared with the most-reviewed business on the listMeasured
Recency5%Share of reviews from the last 12 monthsNot yet collected
Availability5%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%How clearly the business does this trade (its Google category and name)Measured
Proximity5%Based in the city scores highest, less the farther away it isMeasured
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)Measured
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodicallyMeasured
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there areMeasured

Roofers in Cornwall: frequently asked questions

Who is the best roofer in Cornwall?

By CR Score, the highest-ranked roofer in Cornwall, ON is Phil's Reno and Roofing with a CR Score of 66/100. It has 4.8★ from 71 Google reviews. It is open 24/7. Moreno's Roofing Inc (#2) and Garlow Roofing (#3) follow. We ranked 22 roofers on ten factors, last updated October 22, 2026.

How many roofers are there in Cornwall?

ContractorsRanked ranks 22 roofers serving Cornwall, ON. 15 of them are based in Cornwall; the rest serve it from nearby towns. Another 20 within 64 km are listed but not ranked yet. Counts are as of October 2026.

Which roofers in Cornwall are open 24/7?

5 ranked roofers in Cornwall post 24/7 hours. The highest-ranked are Phil's Reno and Roofing (#1), Moreno's Roofing Inc (#2) and WINMAR Cornwall (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which roofers in Cornwall work on weekends?

10 of 22 ranked roofers post Saturday hours and 7 post Sunday hours. The highest-ranked open Saturdays are Phil's Reno and Roofing (#1), Moreno's Roofing Inc (#2) and Garlow Roofing (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does roof replacement cost in Cornwall?

Roof replacement typically costs CA$10,540 to CA$19,680, with CA$14,050 typical (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)). This is a national range, not adjusted for Cornwall. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Cornwall roofers have?

The median Google rating among 22 rated roofers in Cornwall is 4.7★, with a median of 7 reviews. Garlow Roofing has the most, 85 reviews, and ranks #3. We adjust ratings for review count, so a few five-star reviews cannot top the list.

When is the best time to hire a roofer in Cornwall?

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.

How does ContractorsRanked rank roofers?

Each roofer 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.

Update log for Cornwall

  1. October 2026: CR Scores recalculated for 22 roofers serving Cornwall.

More roofers and Cornwall pages