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FeaturedVerifiedRoofers in St. Catharines, Ontario

Ace 1 Quality Roofing

Featured in St. Catharines Today 5.00 (11 reviews)(289) 219-1665

Ace 1 Quality Roofing provides residential and commercial roofing services in St. Catharines and throughout the Niagara Region. Its shingle work includes products from GAF, IKO, Timberline, CertainTeed and Malarkey.

Business Highlights
  • The company says Dan Mahon owns and operates it and has more than 15 years of roofing-industry experience.
  • It is an IKO Select Certified Contractor.
  • It is a GAF Certified roofing contractor.
  • It is a Malarkey Certified Pro Contractor.
  • The company says it is fully licensed and insured.
  • It offers free, no-obligation consultations and estimates.
  • A free drone inspection includes pictures of roof damage and roof layouts.

Service Area

St. Catharines, Niagara Falls, Welland, Thorold, Fort Erie, Port Colborne, Grimsby, Pelham, Fonthill, Fenwick, Lincoln, Beamsville, Vineland, Jordan, Niagara-on-the-Lake, Wainfleet, West Lincoln, Virgil and Ridgeway.

Featured on ProsGrade. Ace 1 Quality Roofing is one of 12 roofers ProsGrade lists in St. Catharines, Ontario.

Listing details

9 services listed, including Roof replacement and installation, Roof repairs and maintenance and Metal roofing. Open 24 hours, 7 days a week. Rated 5.0 from 11 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How Ace 1 Quality Roofing compares with the other 11 roofers on ProsGrade in St. Catharines, using public Google ratings and review counts.

  • Ranks in the top quarter of the 12 St. Catharines roofers on ProsGrade by Google rating and review volume.
  • Rated 5.0 on Google, at or above the 4.8 average of other St. Catharines roofers on ProsGrade.
  • One of 10 St. Catharines roofers on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

9 services
  • Roof replacement and installationarchitectural asphalt shingles
  • Roof repairs and maintenanceroutine, emergency and storm-damage repairs
  • Metal roofingflat metal roofing
  • Eavestroughs and guttersinstallation, repair and maintenance; fascia; gutter installation and cleaning
  • Sidingvinyl, fibre cement, wood, metal and aluminum
  • Attic insulation and ventilationinsulation; attic vent installation and repairs
  • Skylight installationVELUX MK04
  • Storm damage assessment and remediation24/7 storm response, emergency tarping and insurance-claim support
  • Exterior repairsroofing, siding, gutters, windows and doors

Reviews

What customers say

Customers praise quick responses and professional crews; some also mention clear explanations and tidy work sites. One customer says Dan walked through the project scope in detail, returned the next morning after a leak, addressed the issue and discussed ways to prevent a recurrence.

Customer Reviews

Martine Rioux

After the snowstorm we had last week we needed roof repairs done quickly and Ace 1 Quality Roofing delivered. Their team was fast to respond, professional, and got the repairs completed efficiently. They explained everything clearly and left the site clean. Great roofing service in St. Catharines—highly recommend!
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Michael James

I spent a lot of time collecting RFQs for the roofing and siding work on my addition, and Ace 1 Quality Roofing stood out immediately. From the start, Dan was completely transparent about materials, methods, pricing, and quality. Nothing was vague or glossed over. Because this wasn’t a straightforward roof, he took the time to walk through the scope in detail so there would be no surprises, add-ons, or upcharges later. His pricing was fair and clear. The install itself was scheduled during poor weather, with framing crews still on site. The risk of exposing the interior of the house was high. Dan’s crew arrived fully prepared and coordinated seamlessly with the framers so exposure was kept to an absolute minimum. The roof went on smoothly, looked great, and every detail was addressed properly. Fast forward two months. This winter has been brutal, and ice damming is affecting nearly every home in my neighbourhood. While I was still in the process of installing insulation and vapour barrier, a small leak appeared overnight. I called Dan, and he showed up first thing the next morning. He immediately identified and addressed the issue—apologizing, even though the cause was not his materials, workmanship, or installation. It was the result of extreme ice damming in a congested roof area and my own delay in completing insulation. Despite that, he cleared the problem and walked me through several preventative solutions to ensure it wouldn’t happen again. That level of response was above and beyond what was required, and it says a lot about how Ace 1 operates. This industry has no shortage of potential problems. I’m confident Ace 1 Quality Roofing isn’t one of them. Dan and his crew stand behind their work, offer customized solutions, and remain transparent from start to finish. Their reputation clearly matters to them—and it shows. Thank you, Dan, and the entire Ace 1 team
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Matt C

We hired Ace 1 Quality Roofing for a full roof replacement in St. Catharines, and the experience was excellent from start to finish. The crew was professional, on time They removed the old roof and installed the new roof with great attention to detail. It’s clear they take pride in their work. If you’re looking for a reliable roofing company in St. Catharines or the Niagara Region, I highly recommend Ace 1 Quality Roofing.
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Frequently Asked Questions

How long does a roof replacement by Ace 1 Quality Roofing take?

Most residential roofing projects take 1–3 days, depending on size and weather.

Does Ace 1 Quality Roofing offer financing?

Yes. Flexible financing options are available for roofing projects.

Does Ace 1 Quality Roofing guarantee insurance claim approval?

No. The insurer determines coverage, and Ace 1 says it does not guarantee claim approval.

What warranties does Ace 1 Quality Roofing offer on roofing work?

The company lists workmanship and manufacturer warranties for roofing work.