Flat Roofing
Commercial Flat
Roof Installation
Flat roof installation for storefronts, offices and multi-unit buildings across London and Southwestern Ontario.
Commercial flat roofing built around your schedule
Roof work has to fit around the business underneath it. Before we start, you’ll know the scope, the schedule and how we’ll manage access. We keep each section watertight as the job moves forward and clean up at the end of every day.
We install EPDM, TPO and modified bitumen systems, with tapered insulation to move water off the deck. Every detail is built for Ontario’s freeze-thaw cycles and follows Canadian Roofing Contractors Association guidelines, and every roof comes with a full two-year warranty plus a five-year maintenance plan.
What’s included
Membrane systems
EPDM, TPO and modified bitumen, selected for the deck, drainage, roof traffic and budget.
Tapered insulation
Engineered slope packages that move ponding water to the drains instead of letting it sit.
Flashing & detailing
Curbs, parapets, HVAC penetrations and drains are the details that decide whether a roof leaks.
Re-roofing options
For an aging roof, we can price both a full tear-off and a recover when the existing assembly allows it.
Free quote
Price your commercial roof
Tell us about your building and we’ll book a free on-site inspection.
Why Legacy
Ownership you can see
- Business-minded scheduling
We plan the work around your hours and keep your building watertight overnight. - A clear point of contact
You know who to call from the first inspection through the warranty period. - Clean, safe sites
Tidy staging, daily cleanup, and clear communication with your staff and tenants.
How it works
Your commercial roof, step by step
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1
Inspect
A free on-site inspection of the deck, drainage and existing assembly.
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2
Quote
An itemized quote with system options and a schedule you can plan around.
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3
Install
Membrane, insulation and flashing installed to spec, watertight every night.
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4
Warranty
A full two-year warranty plus our five-year maintenance plan, in writing.
Commercial flat roofing FAQs
How long does a commercial flat roof installation take?
It depends on roof area and complexity. After the inspection we give you a firm schedule, and we keep the building watertight throughout.
Can you work while my business stays open?
Yes. We stage the work, control noise and access where we can, and coordinate timing with you before we start.
Which membrane is best: EPDM, TPO or mod-bit?
Each has its place. We look at your deck, drainage, foot traffic and budget, then recommend one system and explain why.
Do commercial roofs come with a warranty?
Yes, every roof we put down comes with a full two-year warranty and a five-year maintenance plan with annual condition assessments.
Get started
Get a free
quote today
Find out why Legacy Flat Roofing & Sheet Metal are the best in the business.