Your Roof's Fall Checkup Before Winter Arrives

The first heavy snowfall in Calgary often seems to show up all at once, turning the browns and golds of autumn into a white blanket overnight. Before that happens, during the calmer and usually sunny days of fall, it is a good time to look up at the roof. A roof that sheds summer rain without any trouble can behave very differently under the weight of packed snow. Slow melt and refreeze cycles can build ice at the lower edge, and water will look for paths into the house that it would never use during a quick downpour.

A View From the Ground

Your first check does not need a ladder. You can learn a fair amount just by walking the perimeter of the house on a clear day. If you have binoculars, they help you see closer. Look for shingles that curl at the edges, show cracks, or are missing altogether. Pay closer attention to the valleys where two roof planes meet, because that is where a lot of water and debris collect. Any damage in those areas matters more.

Watch for dark streaks or patches on the shingles. Sometimes this is algae or moss, which is a minor issue on its own, but it can also mean the surface granules are gone and the shingle is starting to soak up water. Scan the metal flashings around the chimney, plumbing vents, and any skylights. From the ground you can usually see if a piece is bent, lifted, or rusted. These metal parts seal the gap between the shingles and anything that comes through the roof. When they fail, leaks are common.

Getting Closer on the Ladder

If you are steady on a ladder and the roof has a gentle, walkable pitch, a closer inspection can help. Before you go up, check that the ladder sits on firm, level ground. The most important part of this work is knowing when to stop. No small repair is worth a fall, so if you feel uneasy, it is time to bring in a roofer.

Once you are at the edge of the roof, start by looking in the gutters. A light dusting of sandy shingle granules is normal. A thick layer means the shingles are wearing out and losing their protective surface. That leaves them brittle and easier to damage from hail or ice. Gently lift the lower edge of a few shingles along the eaves. If they bend without cracking, they are usually in decent shape. If they feel stiff and snap or crease, they are getting near the end of their service life.

I once inspected a house in Varsity where the homeowner had a stubborn winter leak in his living room. He had new gutters installed and figured his problems were solved. When I got up on the roof, I found the caulking around his plumbing vent had dried out and broken up into a dozen little pieces. Snow would melt around the warm pipe and the water ran straight down the stack into the wall below. It was an easy repair, but one he could not see from the ground.

Look for nails that have worked themselves up and are pushing against the shingle above them. Each one can give water a way in. Check the sealant around the base of vents and around flashing. Like the caulking in a tub or shower, it can dry, shrink, and pull away, leaving a narrow gap that water will find.

What the Attic Can Tell You

The condition of the roof also shows up inside the attic. On a bright day, go up and turn off the light. Look at the underside of the roof sheathing. If you see pinpoints of daylight, there is a hole that needs attention. Look over the wood for dark stains or any patch that looks different from the surrounding area. Spend extra time around chimneys, vents, or any roof penetration. Stains on insulation are another sign of past or current leaks.

Ventilation is an important part of a healthy roof system in winter, especially for limiting ice dams. When the attic has good airflow, the roof surface stays closer to the outdoor temperature, which keeps snow from melting and refreezing at the eaves. A very hot attic in summer usually points to poor airflow, and it is worth spending some time checking attic ventilation before the cold weather settles in so that moisture has a way out.

Knowing When to Hire a Roofer

A homeowner can often handle small tasks such as sealing a short gap in the caulking around a vent. If your walk around the property turns up larger issues like many missing or damaged shingles, or if you find clear signs of a leak in the attic, it is time to call a roofer. They bring the proper safety gear, are used to working on steep slopes, and can give a realistic opinion on how much life is left in the roof.

Paying a roofer for a fall checkup can make sense. They can swap out a few damaged shingles, secure loose flashing, and re seal penetrations for a modest cost. A bit of this kind of work in October often avoids the hassle and higher cost of tracking down a leak in January when everything is buried in snow and ice.