Flat & Low-Slope Specialists
TPO, PVC, EPDM, SBS/BUR & metal — specified for Toronto weather and building use.
Why Commercial Property Owners Choose Us
Clear, Itemized Scopes
Alternates & timelines with daily site updates and photo documentation.
GTA Coverage
Toronto, Etobicoke, North York, Scarborough, Mississauga, Vaughan, Markham and beyond.
Owners and facility managers choose QRS because we pair disciplined project management with practical roofing know‑how. Before work begins, we map access, protection and drainage so tenants stay open and safe. During installation, you receive daily photo updates, weather‑window plans and a single point of contact who answers fast. We build to manufacturer details and local code, document every tie‑in and test critical seams and drains before close‑out. After turnover, we provide a maintenance plan and budget guidance to maximize service life and protect warranties. Whether it’s a targeted leak repair or a multi‑phase replacement, our approach reduces surprises, shortens downtime and keeps roofs performing through Toronto’s freeze‑thaw cycles.
Commercial Roofing Services
New Installation
- Tapered insulation design & code R-values
- Mechanically attached or adhered systems per spec
- QA walkthrough and documentation
Roof Replacement / Re-roof
- Controlled tear-off with protection & staged dry-in
- Upgraded edge, drains & penetrations
- Manufacturer-approved details
Leak Repair & Diagnostics
- Moisture tracing, core cuts & IR/visual inspection
- Photo-documented repairs & after-action notes
Preventive Maintenance
- Spring & fall inspections, drain/scupper cleaning
- Seam & penetration checks with minor fixes
24/7 Emergency Response
- Rapid dispatch to stop active leaks
- Temporary dry-in then permanent scope & quote
Roof Asset Reports
- Condition index, photo map & budget forecasts
- Recommended timelines by area
Commercial Roofing in Toronto — Systems, Details & Maintenance
Modified Bitumen (SBS / Torch-On)
Modified roofing systems became the industry standard as contractors moved away from old “hot tar” methods and legacy materials. Asphalt is naturally waterproof, but on its own it doesn’t handle expansion and contraction well—so manufacturers add polymer modifiers to improve flexibility and durability. In Toronto’s freeze–thaw cycles, SBS modified bitumen (torch-on) remains one of the most common commercial flat roofing solutions.
EPDM Roof Systems (Single-Ply Rubber)
EPDM is a proven single-ply membrane used on many commercial flat roofs across Toronto and the GTA. EPDM typically comes in large rolls and is installed over insulation and a cover/recovery board. Depending on the roof design, it can be fully-adhered or mechanically fastened. Recognizable EPDM manufacturers include Firestone and Carlisle.
Flashing Details (Where Most Leaks Start)
Most commercial leaks don’t begin in the “field” area of the roof—they start at details: wall transitions, curbs, drains, scuppers, skylights, and edge metal. If the existing roof assembly has no trapped moisture and the insulation/decking is sound, a re-cover (overlay) may be an option for cost savings. However, it can limit manufacturer warranty options and may reduce long-term service life, so moisture scans and/or core cuts should be completed before deciding.
Maintenance Program (Prevent Leaks Before They Spread)
We offer a practical roof care and maintenance program for Toronto building owners, property managers, and facility teams. It can be tailored to your site needs and typically includes seasonal inspections, drain clearing, seam checks, and targeted repairs to high-risk areas—helping reduce emergency calls and extend roof life.
Torch-Applied Roofing (Commercial Flat Roof Systems)
Torch-applied commercial roofing commonly uses SBS modified bitumen cap sheets. Bitumen (asphalt) has excellent waterproofing qualities, but it needs modifiers to handle movement and temperature swings. With proper surface prep, compatible primers, correct heat application, and clean detailing, torch-on systems can perform extremely well on commercial roofs in Toronto’s climate.
Roof Systems We Install & Service
TPO (Thermoplastic Polyolefin)
Heat-welded seams, high reflectivity and strong performance for large footprints.
PVC (Polyvinyl Chloride)
Heat-welded with excellent grease/chemical resistance — ideal for restaurants and certain industrial uses.
EPDM (Single-Ply Rubber)
Proven longevity and flexibility; great for expansive roofs and overlays where allowable.
Modified Bitumen (SBS/APP) & BUR
Multi-ply durability with robust detail work around curbs and penetrations.
Commercial Metal Roofing & Flashings
Architectural/structural panels, copings and edge metals for high wind performance and long service life.
Our 5-Step Process
1
Assessment — site walk, measurements, details inventory & safety review.
2
Scope & Options — clear spec with alternates, schedule & milestones.
3
Staging & Protection — access plans, barricades, tenant liaison, debris control.
4
Installation — certified crews, daily photos, manufacturer details.
5
QA & Close-Out — punch list, final inspection, photos, warranties & maintenance plan. See more of our roofing services in Toronto
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Project Snapshots
Service Areas (GTA)
Toronto · Etobicoke · North York · Scarborough · Mississauga · Brampton · Vaughan · Richmond Hill · Markham · Woodbridge · Oakville · Burlington · Kleinburg · Bolton
FAQs — Commercial Roofing Toronto
What’s the best commercial roofing system?
It depends on building use, exposure, budget and code. We present TPO, PVC, EPDM and SBS/BUR options with pros/cons for your footprint.
Can you replace roofs in winter?
Yes — with weather windows and proper sequencing. Some adhesives and membranes have temperature limits; we plan accordingly.
How long will replacement take?
From days to several weeks based on scope, weather and access. We publish milestones and coordinate with tenants.
Do you offer maintenance plans?
Yes. Semi-annual inspections plus minor repairs extend roof life and help protect warranties.
Will my business stay open during work?
We plan odor/noise windows, barricades and access routes so operations continue safely.
What do I receive at close-out?
Final photos, as-built notes, warranty information and a care/maintenance plan.
External Resources
Helpful official sources for owners and facility managers:
Ready for a proposal?
Book a roof assessment and receive a clear, itemized scope with options and schedule.
- Manufacturer-registered system warranties (where applicable)
- Workmanship warranty per contract scope
- Close-out package with photos & maintenance plan
Helpful links: Roofing Services · Flat Roofing in Toronto · Commercial Roof Replacement · Service Areas · Contact