Your roof plays a critical role in protecting your home from Calgary’s unpredictable climate. From high winds and hail in the spring to heavy snow and ice in the winter, roofing systems here endure constant stress. Knowing when you need a roof replacement isn’t always obvious, but waiting too long can lead to costly structural damage or insurance complications. If you’re wondering if your roof is nearing the end of its life, there are clear signs you can look for before water starts dripping from the ceiling.
How Long Does a Roof Last in Calgary?
Most asphalt shingle roofs in Alberta last between 15 and 25 years. However, harsh weather conditions or a poorly installed roof can shorten that lifespan. Prolonged exposure to freeze-thaw cycles, UV rays at high altitudes and sudden hailstorms can weaken roofing materials over time. If your roof is over 20 years old and hasn’t been replaced or re-shingled recently, it’s wise to consider a professional inspection. A roof that’s more than 20 years old may still look fine from the ground, but it could already be compromised.
Signs Of Wear You Shouldn’t Ignore
Visible wear is one of the most reliable indicators that a roof may need replacing. In Calgary’s dry, sunny summers and windy shoulder seasons, shingles can become brittle and start to lift. If you notice your roof shingles curling upward, cracking, or breaking off entirely, it’s a sign that the roofing system is losing its protective barrier.
Granule loss is another important sign. Asphalt shingles have a protective layer of granules that shield against UV damage. If you find granules in your eavestroughs or see bald spots on your roof, that protective layer is likely breaking down. While minor granule loss is normal over time, widespread loss exposes the underlying material and leaves your roof vulnerable.
Stains or streaks on ceilings or walls inside the home suggest a leak has already formed. In Calgary, ice damming is a common culprit. When snow melts and refreezes at the eaves, water can be pushed back under the shingles, eventually seeping into your attic. These leaks can go unnoticed for months if your attic isn’t routinely checked.
Another often overlooked sign is sagging. A dip in the roofline can point to trapped moisture, structural damage or rot in the decking. This isn’t just a cosmetic issue, it could signal a safety concern that needs immediate attention.
Damage Beyond Repair
Some issues can be addressed with a simple roof repair, but others require a full replacement. If repairs are becoming frequent or new problems appear every season, it may be more cost-effective to replace the entire roof rather than continue with patchwork fixes. A thorough inspection by a reputable roofing company can help determine whether repairs will suffice or if replacement is the more practical solution.
If you’re unsure about your roof’s condition you can schedule an evaluation with a certified local contractor. Calgary homes face a unique blend of climate stresses that make early detection and timely action essential. An expert can assess not just surface-level issues but also the underlying structure, ventilation and insulation—all of which affect your roof’s longevity.
The Earlier You Act, The Better
If you suspect your roof may be due for replacement, don’t wait until a leak confirms it. Calgary’s climate doesn’t leave much room for delay. The earlier you act, the more options you have.
At Marku Roofing, we help Calgary homeowners make confident decisions about their roofs. We offer detailed inspections, honest assessments and replacement systems that are built for our local conditions. When it’s time to replace your roof, you’ll know exactly what to expect — and you’ll know it’s done right.