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A leaking crack in a basement wall is fixable — and cheaper to fix now than later.
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Many poured concrete walls develop small cracks as they cure. Those cracks often let water in even when they aren't a structural concern.
Leaking cracks in poured walls are commonly sealed by injecting them from the inside. Block walls leak differently — through mortar joints and hollow cores — and usually need a drainage approach.
Cracks that are widening, horizontal, or offset can mean the wall is moving. Have those inspected by a contractor promptly.
Fixr puts crack injection at $250 to $1,000 per crack. Cracks in block walls usually need a drainage approach instead. Our guide to basement wall cracks explains which cracks need a structural inspection.
Thin vertical cracks in poured walls are common and often only a water concern. Horizontal cracks, stair-step cracks in block walls, or cracks that keep widening can indicate movement and should be inspected.
Small, dry cracks can be patched with hardware-store products for appearance. A crack that actively leaks usually needs injection through the full thickness of the wall to stay sealed. Cracks that are widening or horizontal need a professional evaluation.
No. Poured walls usually show single vertical or diagonal cracks. Block walls tend to crack along mortar joints, often in a stair-step pattern, and leak through the hollow cores, so they're usually fixed with drainage rather than injection.