How to bid on roofing contracts in Ontario

20 roofing tenders open in Ontario right now, from 15 public buyers.

1. Where Ontario posts roofing tenders

Ontario public buyers post roofing solicitations on Ontario's OTP and BidsAndTenders and increasingly on national platforms like CanadaBuys. Municipal buyers in Ontario may also use Biddingo or BidsAndTenders. Checking each portal daily is how opportunities get missed — a single aggregated feed solves it.

2. What documents you need

Most Ontario roofing solicitations require: proof of insurance (typically $2M+ liability), WSIB or provincial workers' compensation clearance, relevant trade certifications and licenses, and references from comparable public work. Federal buyers add security clearance requirements. Read the full RFP — requirements buried on page 40 disqualify more bidders than pricing does.

3. Never miss a deadline

The next roofing deadline in Ontario closes 2026-10-02. Deadlines cluster at month-end and quarter-end. A weekly digest with your trade and province pre-filtered catches everything without daily portal-checking.

4. How roofing contracts are valued

Public buyers in Ontario follow procurement thresholds: smaller purchases may use simplified quotes, while larger roofing projects require formal RFPs with published evaluation criteria. Winning bids typically price 5–15% below the engineers' estimate on construction-adjacent work.

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Browse live Ontario roofing tenders · November 2026 deadlines