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Commercial Flat Roofing in Ottawa

Installation, Repairs & Maintenance for Commercial, Industrial & Institutional Buildings

Your roof is more than a barrier— it’s the backbone of your building’s performance.

At Markelangelo’s Roofing, we specialize in commercial flat roofing systems designed to withstand Ottawa’s climate, support heavy-duty operations, and deliver long-term value. Whether you manage a distribution center, educational facility, healthcare campus, or multi-tenant property, we deliver reliable protection with minimal disruption.

Why Property Owners Trust Markelangelo’s:

Understanding Flat Roofing

Flat roofing is the go-to for commercial, industrial, and institutional buildings. It features a low slope (under 10°) that efficiently drains water through internal systems like drains or scuppers. These roofs are built with:

  • A rigid deck (wood, concrete, or steel)
  • Thermal insulation
  • A waterproof membrane (like TPO, EPDM, or modified bitumen)

Why it works:

Flat roofs maximize usable space—ideal for HVAC units, solar panels, skylights, or rooftop features. They’re cost-efficient, fast to install, easy to maintain, and fit seamlessly with modern architecture.

Our Commercial Flat Roofing Systems

We install and service all major commercial flat roofing systems with certified precision and manufacturer-grade materials:

TPO
(THERMOPLASTIC OLEFIN)

Highly reflective and energy-efficient. Great for large warehouses, retail centers, and LEED-focused buildings.

EPDM
(Rubber Roofing)

Flexible and durable, ideal for schools, hospitals, and low-slope structures requiring proven weather protection.

Modified
Bitumen

Multi-layered protection with resistance to foot traffic, hail, and UV—perfect for high-traffic rooftops or complex drainage layouts.

Our Process:
Flat Roofing Done Right

Initial Consultation & Roof Assessment
We inspect your roof structure, drainage system, and building use to recommend the right system for your needs and budget.

Detailed Scope & Quote
Transparent proposals, clear timelines, and multiple material options with pros and cons explained.

Permit & Safety Planning
We coordinate with local by-laws, building codes, and on-site logistics for seamless execution.

Professional Installation
Our experienced commercial crews work safely, efficiently, and with full site protection protocols in place.

Final Inspection & Ongoing Support
We complete a final walkthrough, provide warranty documentation, and offer preventative maintenance packages.

Serving Ottawa & Surrounding Areas

We proudly offer residential and commercial roof snow & ice removal in Ottawa and surrounding communities, including:

Nepean, Kanata, Orleans, Stittsville, Barrhaven, Gloucester, and beyond.

Client testimonials:

4.9
Based on 122 reviews
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Irina Vitalya
03:40 01 Jul 25
As a senior operations manager, I am impressed with Markelangelo! I needed to get our roof fixed as it was missing a few shingles but was dreading the process and finding the right company. My expectations were high for quality work and no waiting on the phone and the goal was to find a company in the east end that would quickly provide a quote and get the work completed. It took 5 days from the initial phone call to getting the roof fixed, incredible! Excellent customer service, throughout the entire process from getting a quote to receiving a completion report and invoice payment! Markelangelo raises the bar for customer service excellency in Ottawa!
Stéphane Duhaime
00:44 19 Jun 25
Amazing job repairing my siding by Liz and Shawn. Great crew👌I will definitely use this company again.
Myuh Esstoner
15:28 18 Jun 25
My landlord hired Markelangelo's for full replacement and I must say that the condition that they left the exterior of our home was immaculate and very appreciated!
Thank you to all your roofers for going above and beyond 🙂
D Ta
13:22 06 Jun 25
As old bathroom exhaust vents to outside did not seem to work, I am happy to see new insulated vents exhaust to the roof as a permanent solution. Thanks for a job well done!
Tyler Bradley
19:12 05 Jun 25
I hired Markelangelo's for a roof repair - I had a gable roof and a couple of roof vents that needed repairing. I couldn't be happier with the entire process: everything from the initial call, the estimator and the roofer who did the work were top notch. Price was excellent and the estimator was able to give me a quote on the spot. I signed digitally and had the roof repaired the following week.

I would recommend to anyone in Orleans that needs roofing repair to hire Markelangelo's. Thanks.
David McKercher
02:55 08 May 25
I was able to make an appointment within a very few days to replace a 34-year-old set of roof cables which had become faulty and come adrift with the winter ice, and were hanging down, a few feet dangling over the edge of the roof. The craftsman came at the appointed time and completed the work efficiently, tidily and carefully, and within the estimated cost. I was especially impressed by the wiring leading off the roof to the outdoor plug: it was straight across and straight down—very neat and visually appealing. Thank you!
Vickie Benoit
17:58 07 May 25
After a huge wind storm and 1/2 of my shingles gone, Markelangelo's team got back to me quickly and sent a team the next morning to patch the roof until further decision could be made. Excellent communication and work, thank you
Wendy Dempsey
18:38 26 Mar 25
Markelangelo’s Inc. is a terrific Ottawa area roofer. Starting with the sales rep, Kevin, who patiently and professionally responded to all my concerns and provided a detailed quote, to the installation team that arrived on time, completed the roof within a day, cleaned up after themselves and again, responded to my questions, to Amber in the office handling scheduling and invoicing, it was a very positive experience in this negative time!
Young-Soo Roh
00:13 18 Mar 25
I had Kevin provide an estimate for my attic insulation, and he was very prompt in responding to my request and getting the proposal ready quickly.

The installation team, led by Stephen, did an outstanding job. He was polite, professional, and incredibly helpful in answering all my questions. On top of that, he went above and beyond by checking my roof and fixing broken shingles, even though it wasn’t part of the contract. He truly treated the job as if he were working on his own home. Stephen was so great to work with that I plan to request him specifically for my upcoming roofing project.

Thanks for the great work!
Caroline Treacy
02:39 26 Nov 24
Very happy with the service for Markelangelo roofing. We have issues with our roof and knew it needed to be replaced. They came within the same week and completed our roof in a day also installed new baffles. We also had issues with our vents where they found a better solution for them. Workers were very pleasant, and the cleanup was great! never know they were here!
Walter Fogel
20:56 12 Nov 24
Markelangelo’s was recommended to me by a very good friend who had his roof done by them around 15 years ago. From what I can tell, they haven’t missed a beat.
The pricing was extremely competitive and their guarantee is second to none
The crew was punctual, polite and knowledgeable. Michael was in charge of this very professional crew and made sure everything was done as promised in a timely and tidy manner. They did a great job protecting the property before they started and cleaned up after they were done.
I would not hesitate to recommend this company to anyone in need of a new roof.
Robert Proulx
22:06 02 Aug 24
Markelangelo's Roofing did a great job in replacing our roof shingles in a very quick and timely matter. When we contacted Markelangelo's we had a response in less than 24 hours and set up an appointment the following day.
Kevin came out took a look at where we had a leak, then looked at the roof and flashing tracing back from the leak. Kevin then proceeded to inspect the attic for any signs of water damage or leaks, and even went up on one of the secondary roofs to check if the boards were stable.
The job was completed in less than two weeks from the time we signed with Markelangelo's Roofing.
We are very pleased with Markelangelo's Roofing and would highly recommend them for any roofing contract.

contact us for a free quote