Finding and Addressing Foundation Cracks


A concrete foundation will settle over time and develop small cracks and fractures. Le-Squeegee has a few tips in this blog on when a foundation crack can be issue and need a professional solution.

The three common types of foundation cracks are vertical, diagonal and horizontal – A vertical crack is the most common type and most often occurs from the foundation settling after it is constructed. A crack that runs between 30 to 75 degrees from vertical on a foundation is considered a diagonal crack. If it runs across a large wall, a diagonal crack is concerning. Most often, diagonal cracks come from the corner of a window. A horizontal foundation crack runs from 75 to 90 degrees from vertical. This is always a major concern as it points to structural issues with the foundation.

Foundation cracks wider than …› of an inch or foundation cracks that run horizontally are an immediate concern – If a foundation crack with any of these characteristics is found, it needs immediate attention. Cracks that run vertically or diagonally that are wider than …› of an inch can most often be fixed with an injection. However, horizontal cracks often need a structural repair. The most common options for a structural repair are piering, bracing and reinforcing.

How to spot a foundation crack – If a basement level is unfinished, a foundation crack can be spotted with a visual inspection. It gets more difficult when a basement is finished and the foundation walls are not exposed. Common signs of a foundation issue in a finished basement include doors and windows not closing properly, bowing or warping in drywall or damp drywall and carpet. Another common sign is a musty smell in the basement. This occurs from water settling inside the walls from a foundation crack leak.

Foundation cracks most often leak in the spring – As the snow melts and the ground becomes saturated, water will push up against the foundation and leak through large cracks. This is a common source of water damage in a home during the spring. If you suspect a foundation crack is leaking, get a restoration company involved immediately. Ask them to inspect using a thermal camera and a moisture meter to find if any water is leaking through a crack.

Ask about warranties when picking a foundation crack solution – Most professional companies will offer a warranty with their foundation crack solution. Make sure to ask about any warranties as they can help you make an informed decision.

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