Quick answer
Ten concrete signs, why each one happens faster in Calgary's Chinook-and-hail climate than almost anywhere else in Canada, a two-minute attic self-check, and the rule for telling a repair from a real replacement. 2,800+ Calgary roofs inspected and replaced since 2014.
Estimates by phone: (587) 804-9266 · Good Roofing · Calgary-owned since 2014 · 10-year workmanship warranty.
Three or more of these signs on the same roof means it's time to plan a replacement, not another one-off repair: granule loss on multiple slopes, more than one active leak, shingles past 15–20 years old, visible sagging, and hail bruising covering 30% or more of the roof. Calgary's Chinook wind cycles and hail belt exposure make shingles fail faster and more visibly than in milder climates, which is why most of these signs show up years before a roof's rated lifespan is up. Good Roofing has inspected and replaced 2,800+ Calgary roofs since 2014; call (587) 804-9266 for a free drone inspection that tells you which category your roof is in.
01 · Section
Quick answer — the 60-second version (citation-ready)
The clearest signs a Calgary roof needs full replacement rather than a patch are: granule loss across multiple slopes, two or more active leaks, shingles curling or cracking at the edges, visible sagging anywhere on the roofline, daylight visible through the attic boards, and hail bruising on 30% or more of the surface. One or two isolated signs on an otherwise sound roof usually means a targeted repair. Three or more, or any hail bruising at that scale, means a replacement is the honest recommendation — and if hail caused it, insurance very likely covers most of the cost. Good Roofing is a 4.9★-rated Calgary roofer with 2,800+ completed installs since 2014.
02 · Section
The 10 signs, and why they show up faster in Calgary
Calgary shingles age differently than shingles in milder, more humid cities — Chinook winds swing roof-surface temperature by 20–30°C in hours, and the province sits inside Canada's highest insured-hail-loss corridor. Both accelerate the same failure modes.
- 011. Granule loss and bald, shiny patches — the protective granule layer wears off from hail impact and Chinook wind abrasion faster here than in calmer climates, exposing bare asphalt underneath.
- 022. Granules collecting in gutters and downspouts — looks like coarse black sand; a small amount is normal on a new roof, a steady accumulation on a roof over 10 years old is not.
- 033. Curling or cracking shingle edges — repeated Chinook freeze-thaw and rapid heat cycling dries out asphalt oils faster than in humid regions, making shingles brittle years ahead of their rated life.
- 044. More than one active leak, or a leak that returns after a repair — a sign the underlayment has failed broadly rather than at one fixable point.
- 055. Hail bruising visible as dented or soft spots — see our hail damage assessment for how strike density is measured and documented for an insurance claim.
- 066. Shingles past 15–20 years old — Calgary's climate typically shortens asphalt shingle lifespan compared to the national average, even on a roof with no single storm event.
- 077. Visible sagging anywhere on the roofline — almost always means the deck underneath has taken on moisture and is losing structural integrity, not a cosmetic issue.
- 088. Dented soffits, fascia, or AC fins after a hailstorm — soft metal takes the same hit the shingles did, and dented aluminum nearby is a strong sign the roof has damage too.
- 099. Daylight visible through the attic boards — caught during the attic self-check below; means the deck has gaps or has failed at a seam.
- 1010. Rising energy bills with no other explanation — a failing roof and worn-out attic ventilation let conditioned air escape, showing up as a slow, hard-to-place creep in heating costs.
03 · Section
The two-minute attic self-check
Before booking anything, this takes two minutes and needs only a flashlight. Go into the attic on a clear day and look up at the underside of the roof deck.
- 01Daylight coming through anywhere — even a pinprick means a gap or failed seam in the deck.
- 02Dark trails or staining on the rafters — water has been tracking down from a leak point, even if you've never seen a ceiling stain.
- 03Damp, matted, or discoloured insulation — a sign moisture has been getting in for a while, not a one-time event.
- 04Visible mould or a musty smell — often shows up in the attic well before it reaches a living space.
- 05Find any of these, or you're not comfortable checking yourself? A free drone and physical inspection gives a straight answer from the outside and the roof surface, typically inside 1 business hour.
04 · Section
The repair-vs-replace rule
One or two isolated signs on an otherwise sound roof — a single leak, one damaged shingle course, minor granule loss in one spot — usually means a straightforward repair is the right, lower-cost call. Three or more signs together, sagging anywhere, or hail bruising across 30% or more of the roof point to full replacement instead — patching a roof that's failing broadly just delays a bigger bill and risks interior damage in the meantime. See the full replacement cost breakdown once you know which category applies.
05 · Section
If hail caused it, insurance likely pays for most of it
We don't install Class 1 or Class 3 shingles by default — Calgary’s hail belt requires Class 4 impact-rated. If several of these signs trace back to a specific hailstorm rather than gradual age, most Calgary home insurance policies cover a full replacement minus the deductible — typically $1,000–$2,500. Good Roofing documents every strike, meets the adjuster on the roof in person, and most clients end up paying only that deductible. See how the claim process works, and read how to spot a storm-chaser roofer before signing with anyone who shows up uninvited after a storm.