What Causes Foundation Cracks in Alberta Homes?

Paul Bernard
Jul 17, 2025
2 min read

Heavy rain and water around house causing foundation wall crack

Foundation cracks are a common concern for homeowners in Alberta, but not all cracks are cause for panic. Understanding why they happen and when to take action can help protect your home’s structural integrity and prevent more serious issues like water leaks or shifting walls.

Let’s take a closer look at what causes foundation cracks in Alberta, and how to know when it’s time to call in the professionals.

Alberta’s Unique Environment Plays a Big Role

Alberta homes face a range of environmental stressors that directly impact the foundation over time:

Soil Movement & Expansive Clay
Much of Alberta sits on clay-rich soil, which expands when wet and shrinks when dry. This constant movement creates pressure on foundation walls and floors, leading to stress fractures over time. The cycle is especially noticeable in areas with poor drainage or homes built on uneven terrain.
Freeze-Thaw Cycles
Alberta winters are cold, and the temperature swings between freezing and thawing can be dramatic. As moisture in the soil freezes, it expands, pushing against your foundation. When it thaws, the soil settles again. This repeated heaving and settling can lead to new cracks - or worsen existing ones.
Construction & Age of the Home
The materials and methods used during construction matter. Older homes may have foundations made with less flexible concrete or minimal reinforcement, making them more prone to cracking. Even newer homes can develop cracks if the soil wasn't properly compacted before construction, or if the lot has poor grading or drainage.

Are Foundation Cracks Always Serious?

Not all cracks signal danger. Some are simply part of the normal settling process as the home adjusts to its environment, especially in the first few years after construction.

Hairline Cracks: Usually Normal

Thin, vertical cracks (less than 1/8 inch wide) that don’t grow over time are often harmless.
They’re commonly caused by concrete shrinkage or initial settling.

Cracks That May Need Repair:

Horizontal or stair-step cracks in basement walls may indicate structural pressure from outside soil.
Cracks that are widening or changing direction over time.
Leaking cracks - any moisture or dampness is a sign the crack has penetrated the wall.
Cracks near windows, doors, or corners that also affect drywall or floors.

What Should You Do If You Notice a Crack?

Monitor it closely and take note of any changes in size, shape, or moisture. If you're unsure, it’s always better to get a professional assessment - especially before Alberta’s spring melt or after a heavy rainfall.

At CTR Crack Repair, we specialize in permanent, professional crack repair solutions that are built for Alberta homes. From epoxy injection to carbon fiber reinforcement, we offer long-lasting fixes without costly excavation.