How to choose a metal roofing contractor in Ontario

Metal roofs almost never fail because of the metal. They fail at the chimney, at the valley, at the wall transition, at the low-slope porch tie-in — the places where someone had to make a decision and made the easy one.

Which means choosing the contractor matters more than choosing the product. Here are the questions that actually sort them out. We have included how we answer each one, so you can compare directly.

1. Is metal your main business, or a line you offer?

There is a real difference between a company that installs standing seam every week and a general roofer who does a few metal jobs a season. Metal is a sheet-metal trade as much as a roofing trade — brake work, seaming, thermal movement, hemming. It is not shingling with a different material.

Us: metal-focused. Standing seam is what we do daily, and the forming, bending, flashing and seaming are all in-house.

2. Do you form panels on site, or order them from a supplier?

Ordered panels arrive in fixed lengths and get lapped horizontally part-way up the slope. Those laps are the most common long-term leak point on a metal roof.

Us: our roll former travels to the property. Panels are made on your driveway to the exact slope length, ridge to eave, no transverse lap.

3. Snap-lock or mechanical lock — and what is the minimum slope?

Snap-lock clicks together by hand and is not suitable below about 3:12. Mechanical lock is folded closed by a seaming machine and goes to roughly 1:12 in double-lock.

If any plane on your roof is shallow — a porch, a sunroom, a shallow addition — this question decides whether the quote is sound.

Us: 1” mechanical lock as standard, single-lock 90° or double-lock 180° specified by pitch and exposure.

4. What gauge and what paint system?

Get the specifics. “24 gauge with a PVDF (Kynar 500) finish” is an answer. “Premium steel” is not.

Us: 24 or 26 gauge, with a straight recommendation on which yours needs. PVDF or SMP, and we will tell you which one the elevation justifies.

5. How will you handle my chimney, valleys and wall transitions?

The real test. Listen for cricket (the fabricated saddle behind a wide chimney), counterflashing let into the masonry rather than caulked to it, kick-out flashing where a roof edge meets a wall, and hemmed edges.

A contractor who talks fluently about these has done the work. One who says “we’ll seal it up” has not.

Us: all fabricated in-house, on site, to your building’s measured geometry.

6. Tear-off or overlay — and how did you decide?

Any answer given without going into the attic or lifting shingles at a corner is a guess. Overlaying a soft or wet deck is the cheapest thing a contractor can sell you and the fastest route to an expensive failure.

Us: we look, then we tell you. Sometimes the answer is the more expensive one.

7. Where will snow retention go, and why there?

Correct answer: mapped to actual risk — above entries, decks, walkways, parking. Not blanketed across the whole roof, which holds load you would rather shed and can create the ice damming you were trying to avoid.

Also ask how it attaches. On standing seam it should clamp to the seam with setscrews, never penetrate the panel.

Us: every quote in snow country includes a retention assessment, mapped plane by plane.

8. What are you doing about ventilation?

If you have had ice dams, a new covering alone will not fix them. Ice damming is an insulation and air-sealing problem that presents as a roofing problem.

A good contractor raises this unprompted. A great one occasionally tells you to spend money on your attic before spending it on them.

Us: we assess the cavity before quoting a covering, and we will say so if ventilation needs sorting first.

9. Can I see the written specification?

The quote should state: panel profile, width, gauge, seam type, finish and colour, underlayment type and ice-and-water coverage, flashing details, tear-off or overlay, disposal, snow retention, ventilation work, warranty terms, and exclusions.

A single number next to the words “metal roof” cannot be compared to anything.

Us: all of the above, in writing, before you commit.

10. What warranty — from you, and from the manufacturer?

Two separate things. The manufacturer’s finish warranty covers chalk and fade on the coil. The workmanship warranty is from the contractor and covers installation. Both should be in the contract, not in conversation.

Ask how long the company has been trading. A 25-year workmanship warranty from a two-year-old company is worth what you would expect.

11. Proof of insurance and WSIB?

Ask for certificates before work starts. A legitimate contractor produces them immediately. Steep metal roofing is genuinely dangerous work, and if a crew is uninsured on your property, the exposure is partly yours.

Us: fully licensed and insured, documentation on request.

12. Can I speak to someone whose roof you did three winters ago?

Not last month — three winters ago. Metal roofing problems surface after freeze-thaw cycles, not after the final invoice. Recent references tell you a crew is tidy. Older references tell you the roof works.

Two answers that should end the conversation

“We can quote it over the phone.” No. Roof area is not floor area, pitch changes everything, and nobody can assess a deck from a description. A phone number is a way of getting a deposit and revising later.

“Metal roofs are completely maintenance-free.” They are low-maintenance. Valleys need clearing, sealants are consumables, retention hardware wants a torque check. A contractor who says otherwise either does not know or is not telling you.

What we would say if you were asking about us

We are a metal-focused company in Barrie with our own roll-forming equipment, working across Ontario. We publish our pricing. We quote from measurements. We put the specification in writing.

And if standing seam is not right for your building — an unheated drive shed, a house you are selling in two years, a roof that needs structural work first — we will tell you that, even though it costs us the sale. That is not a slogan. It is just the only way to run a business where the product is supposed to last fifty years.

Call 705-816-5282 or get in touch.