Scarborough features a diverse mix of historic homes, mid-century builds, and modern developments. Regardless of your home’s age, local environmental factors play a major role in basement leaks:
Clay-Heavy Soils: Much of Scarborough sits on dense clay soil. Clay expands when wet and shrinks when dry, creating significant groundwater pressure against foundation walls. Over time, this pressure causes concrete to bow and crack.
The Freeze-Thaw Cycle: Ontario winters are notorious for fluctuating temperatures. Water that seeps into small foundation cracks freezes, expands, and widens the cracks, leading to major leaks during the spring thaw.
Aging Infrastructure: Many homes in older Scarborough neighborhoods (like Agincourt, Cliffcrest, or Guildwood) still rely on original, decades-old weeping tiles made of clay. These old pipes frequently collapse or become clogged with tree roots and soil.
Poor Grading and Drainage: Over time, the soil around a house settles. If the ground slopes toward your home rather than away from it, rainwater and snowmelt will pool directly against your foundation walls.
