A hailstorm in Calgary can last ten minutes and leave behind a roof that looks fine but is not. Here is our practical guide: how to tell whether it was damaged, what to do in the days after a storm, and how to rebuild so the next one does less harm.
Calgary is Canada’s hail belt
Calgary sits in Canada’s most active hail belt, so hail is not a rare event for homeowners here but a normal part of owning a roof. Summer storms build quickly along the foothills and drop hail across the city, mostly between June and August.
For a homeowner, that has three practical consequences:
- Hail, not age, ends many Calgary roofs. A roof can be well within its expected lifespan and still need work after one storm.
- Damage is usually hidden. Bruised shingles and cracked mats are almost impossible to see from the ground, and even a quick look from a ladder at the eaves can miss them.
- Neighbourhoods get hit together. When a storm tracks across a community, many roofs on the same streets are damaged at once, which brings door-to-door contractors.
How to recognize hail damage
Hail damage shows up differently on each roofing material, but it always follows one pattern: random impact marks spread across the slopes that faced the storm.
Asphalt shingles
On asphalt shingles, hail leaves soft spots, fractures and granule loss in a scattered, random pattern.
- Bruises and soft spots. A hit can crush the asphalt underneath the granules. Pressed with a thumb, the spot feels spongy, like a bruise on fruit.
- Fractured mats. The fibreglass mat inside the shingle can crack at the point of impact, even when the surface barely changes.
- Granule loss exposing black spots. Impacts knock granules off, leaving dark, roughly round marks where bare asphalt shows. Heavy granule washout at the base of the roof is another clue.
- Cracked or torn edges. Hail striking the exposed edge of a shingle can split or chip it.
Metal roofs
On metal, hail leaves dents, and the key question is whether a dent is cosmetic or functional. A cosmetic dent changes how the panel looks but not how it sheds water. Functional damage includes punctures, cracked or chipped coatings that will rust, and dents at seams or fasteners that loosen the panel.
Flat roof membranes
On flat and low-slope roofs, hail can puncture the membrane or crush the cover board beneath it, and aged, hardened membranes are the most vulnerable. A bruised cover board may not show on the surface but lets the membrane flex and split over time.
Vents, flashing and skylights
Rooftop metal is the easiest place to see hail damage. Dented roof vents, pipe caps, flashing and drip edge, plus cracked skylight domes, are strong evidence that the roofing beside them was struck just as hard.
Hail damage vs normal wear
Hail damage is random and appears suddenly; normal wear is gradual, even and tied to age. The difference matters because insurance generally responds to sudden damage, not wear.
| What you see | Hail or wear? | Why it matters for insurance |
|---|---|---|
| Random dark spots with soft centres | Hail | Sudden impact damage is what policies usually address |
| Even granule thinning across the whole roof | Wear | Age-related loss is commonly excluded |
| Dented vents and flashing on the storm side | Hail | Supports the date and direction of the storm |
| Curling or cupping shingles | Wear | Points to age or poor attic ventilation |
| Cracks in a straight line along shingle tabs | Wear | Thermal cracking, not impact |
| Round fractures in the shingle mat | Hail | Functional damage that lets water in |
What to do after a hailstorm in Calgary
After a hailstorm, stay safe, record the hail and the damage while it is fresh, and get a roofer’s assessment before you file anything.
- Wait for the storm to pass. Lightning often travels with hail.
- Photograph the hail. Set a few hailstones beside a common object such as a coin or a golf ball and take photos showing the date.
- Check from the ground. Look for dented vents, marked siding, damaged screens and granules around the house.
- Look inside. Check upper ceilings, around skylights and the attic if you can do it safely, and note any water.
- Stay off the roof. Wet, damaged shingles are slippery, and walking on them can add damage.
- Get a roofer’s assessment before filing. Knowing how widespread the damage is helps you decide whether a claim is worth it.
- Be careful with door-to-door storm chasers. Take a card, but sign nothing on the spot.
Why hail damage gets worse if you wait
Hail damage rarely stays the same size; it grows with every season you leave it. A fractured mat keeps losing granules, the exposed asphalt dries and cracks in the sun, and water eventually reaches the underlayment and deck.
Calgary’s winters speed that up. Meltwater seeps into cracks during a chinook, then freezes and expands when the cold returns, and those freeze-thaw cycles widen every opening hail created. Damage that was a cosmetic mark in August can be a leak by April.
There is also a paperwork reason to act: policies set their own time limits for reporting damage, and waiting makes it harder to show which storm caused it.
Repair or replace after hail?
Repair is usually right when hail damaged a small part of a newer roof; replacement is usually right when the damage is widespread or the roof was already near the end of its life.
| Factor | Points toward repair | Points toward replacement |
|---|---|---|
| Extent of damage | A few impacts on one slope | Bruising across most slopes |
| Roof age (asphalt) | Well under 15 years | Around 15–20 years or older |
| Matching shingles | Same product still available | Discontinued, patches would stand out |
| Shingle condition | Still flexible | Brittle, cracks when lifted |
| Insurer’s view | Damage limited to a section | Damage assessed across the whole roof |
Asphalt shingles in Calgary typically last about 15 to 20 years. On a roof that old, patching hail damage often buys little time.
The insurance side, in brief
Home insurance often covers hail damage to a roof, but what you receive depends heavily on the age of the roof and your policy. Insurers commonly treat roof age like this, though policies vary:
| Roof age | What insurers typically do |
|---|---|
| Under 15 years | The insurer may pay for a full replacement, minus your deductible |
| 15–25 years | The payout is typically depreciated by 50–80% |
| Over 25 years | The insurer may pay actual cash value only, or deny the claim |
Two other points matter. Your deductible comes off any payout, so small damage may not be worth a claim. And documentation carries weight: dated photos of hail, dented metal and interior water help show what happened. For the full step-by-step, read our guide to the roof insurance claim process in Calgary.
Rebuilding smarter: impact-resistant roofing after hail
If hail means a new roof, it is the right moment to consider impact-resistant shingles. Class 4 is the top rating in the UL 2218 impact test, earned by products that withstand steel balls up to 2 inches.
Many Calgary homeowners upgrade at replacement because the roof is coming off anyway, and a tougher roof is less likely to go through the same damage a few summers later. Some insurers offer better terms for impact-rated roofs, so ask yours before choosing a shingle. If your replacement is part of a claim, our hail insurance claim guide explains how upgrades fit into the process.
How we handle hail damage
We handle hail damage by looking at the whole roof honestly, showing you what we find and giving you a clear plan.
- Honest assessment. We tell you whether hail actually damaged your roof. If the marks are wear or the damage is minor, we say so.
- Photo documentation. You get photos of what we find, so you can see the damage yourself and keep a record of your roof’s condition.
- A plain repair or replace plan. We explain which option fits your roof’s age, extent of damage and shingle availability, and why.
Questions before booking? Contact us and tell us what you have noticed since the storm.
What affects the cost of hail damage repair
The cost of hail damage repair depends on how much of the roof was hit, what the roof is made of and what it takes to match and reach it.
- Extent of damage. A few replaced shingles is a very different job from re-roofing several slopes.
- Roofing material. Asphalt, metal panels and flat membranes each repair differently.
- Matching. Discontinued shingles or colours may mean replacing more than the damaged area.
- Deck and underlayment. Water that got in through fractured shingles can require new sheathing.
- Rooftop items. Dented vents, flashing and cracked skylights add to the scope.
- Access and pitch. Steep slopes and tall walls need more setup and safety equipment.
- Timing. Snow can arrive as early as the third week of September, which can affect scheduling.
If your roof took hail this season, book a free inspection and get an answer before the damage has a winter to grow.