Is a metal roof noisy in a Calgary hailstorm?

Metal roofs have a reputation for sounding like a drum kit in a hailstorm, but in practice a properly installed metal roof on a Calgary house is only marginally louder than asphalt shingles, and sometimes no different at all.

Why the noise reputation exists, and why it usually does not apply

The "tin roof in a rainstorm" image comes from uninsulated metal structures: garden sheds, barns, carports with a single sheet of steel and nothing beneath it. A residential metal roof is a different animal. It sits over solid sheathing (the plywood or OSB deck), an underlayment layer, and a fully insulated and drywalled attic below. That stack of materials absorbs and scatters sound the same way it does with asphalt shingles. From inside a finished house, the difference in rain or hail is usually small.

What does matter is the installation. A metal roof fastened directly to open purlins with no solid deck beneath it will transmit more sound. If a contractor is proposing to remove the existing sheathing and go to a purlin system to save money, ask specifically how that affects sound and insulation, and whether a continuous deck is included in the quote.

Calgary's hail context is worth keeping in mind here. The Insurance Bureau of Canada puts the August 2024 storm alone at roughly $2.8 to $3 billion in insured losses, and the city sits in what the City of Calgary calls "hail alley." Large hailstones, the kind that show up in Calgary every few summers, will make noise on any roof surface. On a metal roof you may hear a sharper impact sound than you would on asphalt, but the difference is modest when the attic and ceiling assembly are doing their job.

The more important hail question is damage, not noise. Class 4 impact-resistant asphalt shingles reduce hail damage significantly, but metal roofing, particularly thicker stone-coated steel or standing seam panels, is also highly resistant. No roof is hail-proof; large enough hail can dent even heavy-gauge steel. Ask the insurer before you choose: the Insurance Bureau of Canada notes that a majority of insurers offer discounts of up to 50% for hail-resistant materials, and what your own insurer offers for metal versus Class 4 asphalt could influence the decision as much as noise does.

On cost and permits: metal roofing in Calgary runs roughly $11 to $20 per square foot installed, compared to about $5 to $8.50 for architectural asphalt shingles, so a typical house lands somewhere between $20,000 and $50,000. The Alberta Permit Regulation's re-roofing exemption covers a similar type of material, and whether metal counts as similar to asphalt is not spelled out. Confirm with the City of Calgary before signing anything, and make sure the contract states clearly who is responsible for arranging any permit that turns out to be required.

A good quote for a metal roof should spell out the gauge and profile of the panels, the underlayment type, whether the existing deck is being kept or replaced, how flashings and penetrations are handled, and the warranty on both the material and the labour. Before any deposit changes hands, check that the contractor holds an Alberta prepaid contracting licence through Service Alberta and request a WCB-Alberta clearance letter.