Here in Chestermere, we are not immune to roofing problems. We have a little thing called winter here. We get lots of cold, which makes the shingles brittle. We also get a lot of snow. Snow essentially makes the roof submerged in water for several months at a time (depending on the year). If you live in Chestermere, make sure your roof is in good condition.
Also, see our inspection picture of the month below. Make sure your roof does NOT look like this one!
Dave Graham, Tempest Home Inspection. Calgary Alberta