Timely • Effective • Enduring

Timely • Effective •

Commercial Flat Roofing

123 Roofing is a leading commercial and industrial roofing company, proudly serving Toronto, the GTHA and throughout Southern Ontario. We specialize in roof replacement systems application, emergency and permanent repair and client care.

Emergency Repair

Over the past 10 years, the weather patterns experienced have changed. Our roofing specialists will repair your roof and prevent further leaks.

Roof Replacement

Our roofing production staff are highly trained in the planning and coordination necessary to ensure the proper execution of your roof replacement.

Roof Repair

All 123 Roofing field staff are highly trained and accredited in roof repair procedure and site management processes, policies and procedures.

commercial logos

123 Roofing Commercial Flat Roofing

We specialize in the application of roof replacement systems, emergency and permanent repair, and exceptional client care. Flat roof replacement and repair is our focus, supported by a strong knowledge of building sciences and water management systems.

We are committed to providing the highest levels of workmanship in our project implementation and the best possible client experience in the industry. Balancing those two aspects of our work, while maintaining value pricing, is what sets 123 Roofing contractors apart from the rest.

123 Commercial Flat Roofing proudly serves all of Southern Ontario, including:

  • Toronto and the GTA
  • Hamilton and Niagara
  • Burlington and Oakville
  • Barrie, Muskoka and the Kawarthas
  • Kingston and Ottawa
  • Kitchener and Waterloo

Commercial Roofing services

Free inspection report

Our multipoint, detailed inspection report will provide a clear view of the current state of your roofing system and allow for our professional assessment specialists to provide their expertise in an easily consumable format:

  • Pictures and/or video documenting the current health and longevity of your roofing system
  • Proactive recommendations for repair, replacement and maintenance
  • All facets of your roofing system will be inspected

Applies only to commercial, industrial or institutional properties. Applies only to first-time clients and can be used only once. Does not apply to any residential properties or commercial insurance claims.

Book Your Commercial Roof Inspection

Free inspection report

Why Choose 123 Roofing for your Commercial Property?

123 Roofing blends educated, experienced and accredited roofing application with diligent, organized and professional business practices to provide industry-leading best practices in all facets of what we do. For you, this translates into the best all around roofing contractor experience possible.

Commercial Roof Replacement

1 2 3 Roofing is an experienced commercial flat roofer with a focus on four main flat roof replacement systems: Modified Bitumen, TPO, EPDM and Silicone Coating recovery. Organized and professional 123 Roofing is equipped to meet any commercial or industrial roofing challenge and make sure that your investment is not only protected, but functioning optimally.

modified bitumen

Modified Bitumen



Commercial Roof Repair

With over 25 years of experience, there isn’t a roofing system that 1 2 3 roofing hasn’t repaired. An expert commercial flat roofer, 1 2 3 Roofing has experience repairing all matter of flat roofing systems. Responsive and diligent, 1 2 3 Roofing is equipped to meet any commercial or industrial roof repair challenge and make sum that your investment is not only protected, but functioning optimally.


silicone coating recovery

Silicone Coating Recovery

Working through Covid-19. 100% Online or Phone Consultations. 100% Financing.