Flat Roofer Comparison Checklist
- WSIB & Insurance: Ask for an active WSIB clearance. Verify here: WSIB Clearance.
- Written Warranty: Minimum 5–10 years on workmanship. See our roof warranty.
- Material & Method: Know the system: SBS torch-on, TPO, or EPDM. Ask for the exact spec (plies, flashing, insulation, slope).
- Photos & Scope: Quote must include before/after photos, detailed scope, and disposal.
- Access & Safety: Confirm ladder/parking access, fall protection, and protection of landscaping.
- References: Two recent flat-roof jobs within the last 12 months.
Pricing Factors (What Really Moves the Number)
| Factor | What to check |
|---|---|
| Roof size & shape | Total sq ft, number of penetrations (vents, skylights), parapets. |
| Tear-off vs overlay | Disposal, deck condition, number of existing layers, code requirements. |
| Insulation & slope | New ISO board, crickets for drainage, target R-value. |
| Membrane system | SBS (torch-on), TPO (hot air), EPDM (adhesive) — choose based on exposure & details. |
| Flashings & metal | New drip edge, parapet cap, chimney & wall flashings. |
| Access & safety | Parking, ladder set-up, power lines, debris chute, permits if needed. |
Tip: For small Toronto roofs, a well-specified SBS torch-on with proper flashings is often the most economical long-term choice; TPO/EPDM can be ideal for larger, low-complexity roofs.
Red Flags
- No WSIB/insurance proof or vague paperwork.
- “One price fits all” quotes without a written scope or photos.
- Skipping slope/drainage fixes on a roof with ponding water.
- Cash-only with no warranty details.
Next Step
Compare two or three quotes using this checklist. When you’re ready to schedule or need a second opinion, see our Flat roofing Toronto page for installs and repairs.
Last updated: September 20, 2025
