Canada’s climate can often be harsh and unpredictable. When it comes to your home, it is important to make sure that you have the right protection for your most important asset – your roof. The following are some warning signs that may help you identify potential roof failure.
Shingle damage can be caused by a variety of factors, most commonly extreme wind conditions, snow and ice build-up, and over-exposure to the sun. Because shingles are not waterproof, broken, torn or missing tabs become entry points for water. Damaged shingles are of even greater concern on lower sloped roofs where water run-off is slower.
Buckling is a visible distortion of waviness in the horizontal lines of the shingles, and usually runs in a straight line up the roof slope. This distortion allows shingle tabs to become exposed to wind, which can result in blow-offs. Buckling is usually a byproduct of a warped roof deck or poor ventilation. The use of thinner-than-recommended plywood and inadequate air intake/exhaust will act as a catalyst.
During the roof’s natural aging process, the bottom edge of the shingle tabs may begin to curl. The resulting bulge is susceptible to substantial damage by wind, hail, snow & ice, and driving rains. This process can be expedited if ventilation is poor.
Many leaks or pooling of water tend to occur at the flashings around vents, soil stacks, chimneys, skylights and vertical wall joints. Consider the following questions when it comes to your roof’s flashings: Is the flashing cracked? Is the caulking around the flashing dried out? Are the shingles that lie over, in or around the flashings in good shape?