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Foundation crack
A foundation crack is a crack in concrete or masonry foundation walls or slabs.
Why it matters
Some cracks are cosmetic, but some leak water or signal movement. The pattern and context matter.
Where people get this wrong
All cracks are not an emergency. Water pressure and drainage often determine whether a crack leaks.
Real-world example
You find a thin vertical crack in a basement wall. It might be shrinkage from curing, or it might be movement. If it leaks during storms, that is useful information.
Where this hits your build
This matters during site work and foundation. Mistakes here get buried and are expensive to fix later. Pay attention before concrete is poured.
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