Basement Wall Crack Repair in Montgomery, AL

Basement wall cracks are a common source of worry for homeowners in Montgomery,

Alabama. While some cracks are harmless, others indicate serious structural issues or active

water leaks. Understanding basement wall crack repair helps you know when to act and what

methods are available.

Types of Basement Wall Cracks

Vertical cracks (straight up and down) are usually caused by concrete shrinkage during curing

or minor settlement. They are often cosmetic. Diagonal cracks (running at an angle) indicate

differential settlement—one corner of the foundation has sunk more than another. Horizontal

cracks are the most dangerous, as they signal excessive lateral pressure from saturated soil,

which can cause the wall to bow inward. Step cracks in block walls follow the mortar joints.

Montgomery Foundation Repair Co classifies each crack to determine the appropriate repair.

Repair Options for Non‑Structural Cracks

For vertical cracks under 1/4 inch wide that are not leaking, you may simply monitor them. For

cosmetic repair, you can fill them with masonry caulk or hydraulic cement. However, for a

permanent seal that also prevents water intrusion, professional injection with polyurethane

foam is recommended. Montgomery Foundation Repair Co can inject these cracks for

$300‑$600 each. The repair is quick (one day) and carries a warranty.

Repair Options for Structural Cracks

Diagonal or horizontal cracks wider than 1/4 inch, or any crack that shows displacement (one

side higher than the other), requires structural repair. First, we must stop the underlying cause

—usually foundation settlement or soil pressure. Settlement is fixed with steel piers. Lateral

pressure is fixed with carbon fiber straps, steel I‑beams, or wall anchors. After stabilization, we

inject the crack with epoxy or polyurethane. Montgomery Foundation Repair Co does not

recommend injecting structural cracks without first addressing the movement; the crack will

simply reopen.

When to Call Immediately

Call Montgomery Foundation Repair Co immediately if you see any of these: a horizontal crack

longer than 3 feet, a crack wider than 1/2 inch, a crack that is actively leaking water, or a visible

bulge in the wall. Also call if you hear popping sounds from the wall. These are signs of

imminent failure. Do not wait for the next rain. Our emergency response team can usually arrive

within 24 hours to assess the situation.

Frequently Asked Questions