Parging applies a thin coat of Portland cement-based mortar over exposed foundation walls, block foundations, and concrete surfaces. This protective layer waterproofs your foundation against moisture intrusion and produces a smooth, finished appearance along your home's base.
In Calgary, Alberta, parging works harder than almost anywhere else in Canada, driven by three relentless forces:
01 Freeze-thaw cycles
According to Environment and Climate Change Canada climate data, Calgary experiences over 100 freeze-thaw cycles annually, far more than most Canadian cities. Each cycle drives moisture into hairline cracks, freezes it, and expands the damage further.
02 Chinook winds
Calgary's signature chinook events can swing temperatures 20°C or more within 2–4 hours. These rapid temperature shifts stress parging surfaces, accelerating crack formation in weakened areas.
03 Clay soil expansion
Much of Calgary sits on expansive clay soil. When saturated, this clay swells and pushes against foundations, cracking both the concrete and the parging that covers it.
Without intact Calgary parging, your foundation absorbs water like a sponge, leading to basement leaks, mold growth, and structural repairs that can exceed $10,000 when moisture reaches load-bearing components.