Calgary's mix of old and new construction means we see two very different sets of drain problems depending on which part of the city we're in. In character neighborhoods like Elboya, Altadore, and Eagle Ridge, the sewer lines are often original clay or cast iron, sometimes 60 to 80 years old, and root intrusion is the most common call we get. Mature elm and spruce trees look great in a front yard, but their roots follow the moisture coming off an old clay joint straight into the pipe.
In newer areas and communities like Chestermere and Airdrie, the pipe material is usually PVC, which doesn't crack the same way, but grease buildup, flushed wipes, and construction debris left over from the original build still cause slow drains and backups. Freeze-thaw cycles add another layer specific to this region. When a hard Chinook melt follows a deep freeze, the ground shifts, and a line that was fine in December can develop a new low spot by March. We've cleared plenty of drains in Calgary that worked fine the summer before and started backing up the same week the ground thawed.
None of this means every clog is a sign of a bigger problem. Most calls are still a simple hair clog or a grease line that needs a routine clean. But knowing which neighborhoods tend toward root intrusion and which tend toward sediment and debris helps us bring the right equipment on the first visit instead of the second.