Noticed missing shingles after a Calgary windstorm? Learn why it happens, the real risk of waiting, and how to tell a quick fix from a bigger roofing issue.
A homeowner notices a bare patch on the roof slope, a shingle sitting in the yard after a windy night, or a neighbour mentions seeing something flap loose overhead. This is one of the more common calls a roofing contractor gets in Calgary, and the right response depends on how much of the roof deck is actually exposed and how old the asphalt shingles already were before the wind got to them.
Missing shingles are not automatically an emergency, but they are never something to leave alone either. A single lifted tab can usually wait a few days for a scheduled repair. A cluster of bare spots, especially on a roof that is already past its expected service life, is a different situation that calls for a prompt roof inspection before the next storm rolls through.
This article walks through why asphalt shingles go missing in Calgary specifically, what happens underneath an exposed spot if it is ignored, how to read the severity from the ground, and what a professional repair actually involves once a crew is on site.
Calgary weather puts more stress on a roof than most people realize. Wind events moving off the foothills can generate sustained gusts well above what asphalt shingles are rated to handle, and that uplift force concentrates on tabs that are already weakened in some way. A handful of factors tend to show up together on roofs that lose shingles:
In many cases it is a combination of two of these factors rather than one single cause. An older roof with marginal nailing and sun-damaged sealant strips needs far less wind to start shedding shingles than a newer roof installed to current standards.
Once asphalt shingles are gone, the underlayment and roof deck underneath are the only layer standing between the house and the weather. That underlayment is a secondary weather-resistive layer, not a long-term roofing surface, and it was never meant to be exposed on its own for weeks at a time.
The timing matters as much as the size of the exposed area. A missing shingle discovered in late fall or early winter is a more urgent situation than the same spot found in July, because of what typically follows:
Professional tip: if a shingle goes missing and a repair crew cannot get out immediately, a temporary tarp secured over the exposed area is far better than waiting it out uncovered. A few dollars of tarp and a couple of ratchet straps can prevent a plywood decking replacement.
None of this means every missing shingle leads to interior damage. Most do not, provided the gap gets addressed within a reasonable window. The risk comes from stacking an exposed deck against an unpredictable stretch of Calgary weather and hoping nothing happens before it gets fixed.
Before calling anyone, a homeowner can usually tell quite a bit just by stepping back and looking at the roof from the driveway or the yard. The pattern of missing shingles says more than the fact that shingles are missing at all.
A patchy pattern of missing shingles spread across an aging roof is usually a sign that the roofing system as a whole is reaching the end of its service life, not that one unlucky spot got unlucky twice. In that case, a repair might stop the immediate leak risk but will not address the shingles elsewhere that are close to following the same path. For a closer look at what those broader warning signs look like, see signs your roof needs replacing.
A straightforward missing-shingle repair is a fairly quick job for an experienced crew, but doing it correctly involves more than just nailing a replacement tab over the gap. A proper repair typically includes:
Most isolated repairs like this can be scheduled and completed within a day once a crew is on site, weather permitting. A 24/7 roof repair service is worth knowing about for storm damage that happens outside business hours, since a fast temporary fix can prevent the kind of decking damage described earlier. If the inspection turns up a broader pattern of wear across the roof rather than one isolated spot, that is also the point where a contractor will walk through whether a full asphalt roofing replacement makes more sense than another round of patch repairs.
Hail is worth a separate mention here, since it is one of the more common root causes behind shingles that look fine on the surface but fail during the next wind event. A roof that took hail impact earlier in the season is a reasonable candidate for an inspection even without an obvious missing shingle yet - more detail on that specific damage pattern is covered in the article on hail damage roof repair.
A missing shingle rarely needs to turn into a bigger project. Catching it early, covering the exposed spot if a crew cannot get there the same day, and getting a straight answer on whether it is isolated or a sign of broader wear keeps the cost and the disruption to a minimum. Homeowners who want that assessment can contact Raico Roofing to request a roof inspection before the next storm or snowfall puts the exposed deck to the test.
There is no fixed rule, but an exposed spot sitting through a rain event or a chinook melt cycle is taking on unnecessary risk. In most cases a repair crew can get a temporary cover or a full fix done within a day or two of the call, and scheduling it sooner rather than later avoids the gap sitting open through an unpredictable stretch of weather.
It depends on the cause. Damage tied to a documented wind or hail event is often covered under a standard homeowner policy, subject to the deductible, while shingles that failed simply from age and wear typically fall under maintenance and are not a covered claim. A contractor can usually tell during the inspection which category the damage falls into and provide documentation either way.
Yes. Nailing patterns that were too high, too sparse, or set at an angle reduce how much wind a shingle can withstand before it lifts. This is one of the more common findings during a closer inspection and is not something a homeowner can usually spot by looking at the roof from the ground.
It is not recommended. Asphalt shingles can be slippery even when they look dry, and a missing shingle often means the surrounding area has already lost some of its grip and structural support. A visual check from the ground or a ladder, followed by a professional roof inspection, is the safer approach.
Contact Raico Roofing for a free quote.