Foundation Crack Repair: Types, Causes & Permanent Solutions

Small cosmetic cracks may appear simple to patch, but surface repairs don’t address the underlying cause. If a crack is growing, leaking or caused by foundation movement, a professional repair helps prevent additional damage and recurring problems. 

Foundation cracks can be a normal part of a home’s aging process. Hairline and small vertical cracks typically come from concrete curing or minor settlement. However, horizontal, widening or leaking cracks may indicate structural movement and should be professionally evaluated to find out whether repairs are needed. 

Foundation crack repair costs differ based on the crack type, its location and whether structural stabilization is needed. Repairs involving foundation settlement or bowing walls are typically more extensive than cosmetic repairs. The best way to get an accurate estimate is with a free professional inspection. 

Water entering through a foundation crack should never be overlooked. While the crack serves as an entry point for water, the underlying cause is often hydrostatic pressure or poor drainage around the foundation. Depending on what’s causing the leak, waterproofing or drainage improvements may also be recommended to help prevent future problems. A professional inspection can determine whether the crack, the drainage or both should be addressed to deliver a long-term solution. 

While some foundation crack types are harmless, some call for prompt attention. Cracks wider than ¼ inch, horizontal cracks, actively widening cracks, water leaks or cracks accompanied by sticking doors, sloping floors or bowing walls may signal structural movement. Isolated, vertical hairline cracks are typically cosmetic, but a professional inspection can verify the cause. 

Horizontal foundation cracks are usually the result of hydrostatic pressure or expanding soil pressing against foundation walls. Unlike many vertical cracks, horizontal cracks usually point to structural movement and may require stabilizing the wall. Depending on the severity, repairs may include CarbonArmor®, PowerBrace®, GeoLock® Wall Anchors or EverBrace®. 

Vertical foundation cracks are usually caused by normal concrete shrinkage or minor settlement and aren’t necessarily structural. However, some may point to ongoing movement or allow water to enter your basement. A professional inspection can determine whether the crack is cosmetic or whether an underlying problem needs repair.