7 Signs Your Calgary Roof Has Hidden Hail Damage

Calgary sits squarely inside Canada's "Hail Alley" — a corridor stretching from southern Alberta to the US border that sees more large hailstorms than almost anywhere else in North America. In 2020 alone, a single Calgary storm caused $1.3 billion in insured losses.

The dangerous reality? Hail damage is often invisible from the ground. By the time a homeowner notices a water stain on their ceiling, the damage has typically been silently spreading for months.

Here are 7 warning signs you should look for — or hire a professional to inspect.

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1. Missing Granules & "Bruised" Shingles

High-impact hail knocks the protective granules off your shingles. This isn't just cosmetic — granules protect the underlying asphalt from UV rays. Without them, your roof will deteriorate rapidly.

Look for dark spots or "bruises" on the shingles that feel soft to the touch, similar to a bruised apple.

Pro Tip: After a major storm, run your hand along the bottom of your downspout. If it comes back dark and gritty, you likely have significant granule loss. Call for a professional inspection immediately.

2. Dented Gutters and Downspouts

Your gutters are often the first place to show hail damage. If your aluminum gutters have visible dings or dents, it's a near-certain sign that your shingles took a similar beating.

Check the "splash blocks" at the bottom of downspouts for accumulations of shingle granules — a sure sign of ongoing roof stress.

3. Cracks in the Siding

Hail doesn't just fall straight down; Calgary wind often drives it horizontally. Check your vinyl siding for chips or cracks. If you have Hardie Board siding, look specifically for "spiderweb" fracture patterns in the paint or surface dents.

4. Damaged Metal Flashing

Check the metal "valleys" and flashing around your chimney, skylights, and vents. Because metal is harder than asphalt, it shows circular dent impact clearly. If the metal is dented, the shingles almost certainly suffered similar or worse damage.

5. Compromised Roof Vents

Plastic roof vents are notorious for cracking during Calgary hail storms. Check the plastic hoods for holes or cracks. If water gets in through a cracked vent, it can lead to:

• Attic mold growth
• Structural rot in roof decking
• Failed insulation R-value

6. Shingle "Circular" Cracks

Large hail can cause crescent-shaped cracks in shingles. This means the fiberglass mat inside the shingle has been fractured — a structural failure. These are priority repairs to prevent leaks during the next Calgary rain event.

7. Pockmarks on Soft Metal Trim

Hail leaves a very specific signature: consistent, random circular indentations roughly the same size across an entire surface. If you see this on your aluminum fascia, soffits, or HVAC condenser fins, your roof was almost certainly impacted too.

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What Should You Do Next?

Step 1: Do NOT attempt to inspect the roof yourself. Hail-damaged surfaces are slippery and structurally unpredictable.

Step 2: Document the storm. Take photos of your dented downspouts, gutters, and any visible damage at ground level. Insurance adjusters will use this.

Step 3: Call a qualified Calgary roofing contractor for a free inspection. A professional inspection report is typically required by insurance companies before approving a claim.

At Calgary Roofing Pro, we provide free hail damage inspections and a detailed photo report you can submit directly to your insurance company. We've helped hundreds of Calgary homeowners successfully navigate their claims after severe storms.

Get a Free Hail Inspection →