A useful roof quote explains the problem, the proposed roof system and what happens if hidden damage is found. Use this guide to compare repair, asphalt-shingle replacement and metal-roof proposals in Ontario.
Sources checked October 13, 2026. This is a planning guide, not a priced estimate, completed-project record or contractor endorsement.
Should I repair the roof or replace it?
Age alone does not diagnose a roof. GAF’s repair-versus-replacement guide considers condition, previous repairs and comparative cost alongside age. Its examples include repair of an older roof with minor problems; turning 15 is not an automatic replacement rule.
Ask a roofer for inspection photos and a written explanation of the leak or damage. The proposal should distinguish an isolated flashing or shingle problem from widespread covering failure or damaged decking. If replacement is recommended, ask why a repair would be unsuitable and request the repair option where practical. For sagging or an active leak, arrange prompt professional assessment; do not walk the roof to investigate.
Compare the complete scope, not just the material name
| Proposal | Questions that make quotes comparable |
|---|---|
| Local repair | Which defect will be repaired? What area and components are included? What remains outside the repair, and what follow-up or warranty is offered? |
| Asphalt-shingle replacement | Which exact shingle, starter, underlay, leak barrier and ridge-cap products are included? Does the specified system suit every measured roof slope? |
| Metal-roof replacement | Is this standing seam, exposed-fastener panel or another system? Which product instructions govern slope, fastening, flashing and underlay? How will penetrations, drainage and any snow-management requirements be addressed? |
For each option, ask whether old layers will be removed, how the deck will be inspected, and who approves and pays for additional deck repairs. A warranty’s headline duration is not a promise that the roof will last that long or that every repair is covered.
GAF’s warranty comparison illustrates differences in product, labour and workmanship coverage. Obtain the actual written warranty for the proposed products and your Canadian installation, plus the contractor’s separate workmanship terms. Ask about exclusions, registration, transfer and required accessories; do not assume a US example governs an Ontario project.
Do I need a roofing permit in Ontario?
The answer depends on the municipality and the work. Toronto’s permit guidance lists replacing existing roofing material without structural work among projects that do not require a building permit. That is Toronto guidance, not a blanket exemption for Ontario.
Before changing the roof structure, slope, openings or loading, confirm the proposed scope with the municipal building department. Ask who will handle any required permit, design and inspections. Ontario’s Building Code resources identify municipal officials as responsible for enforcement and provide access to the current compendium.
What should the quote say about ice protection and ventilation?
Ask for the named membrane, its proposed coverage and the applicable installation instructions. IKO explains that coverage depends on roof conditions, local requirements and the specific product’s instructions. One roll width or distance from the eave does not establish compliance for every roof.
Have the contractor explain the roof or attic assembly, intake and exhaust approach, existing obstructions, and how the proposed ventilation complies with the applicable requirements and product instructions. Avoid accepting a universal ventilation ratio or a general claim that every warranty is void without reviewing the actual assembly and warranty terms.
Roof quote checklist
Request a written scope covering:
- Measured roof area and slopes, exact products, removal and disposal.
- Deck inspection, included repairs and unit prices or approval rules for additional work.
- Flashings, valleys, penetrations, drip edges and ventilation work.
- Property protection, weather contingency, cleanup and inspection photos.
- Permit responsibility where needed, insurance evidence and recent comparable references you can verify with permission.
- Total price, taxes, exclusions, payment stages, change-order approval and written warranties.
The previous GTA price ranges were not supported by a linked quote sample and have been withdrawn. Compare current site-specific proposals with the same scope; a price per square foot is not comparable until the measured area, included work and exclusions are clear.
For more hiring and evidence questions, use the homeowner quote checklist. To ask the community about a roof proposal, include your municipality, roof type, approximate installation year and the scope you are comparing. Remove addresses, contact details and private customer information before posting.
Review note, October 13, 2026: The April reply below is retained as discussion, not independently verified project evidence. Its specific membrane dimensions, weather statements, insurance thresholds and low-bid assumptions should not be treated as universal rules. Confirm the applicable scope, product instructions and insurance terms for your project.
LF Builders operates this community. This update was prepared with AI assistance and checked against the linked municipal, provincial and manufacturer sources. Topic geography does not confirm any contractor’s service area or current availability.
