Georgia's clay soil causes foundation movement in virtually every home. Here's how to tell what requires action.
Virtually every home built on Atlanta's expansive clay soil develops foundation cracks over time. The question is which ones require action and which don't.
Hairline Cracks (Under 1/8"): Cosmetic in almost all cases. Monitor them with pencil marks and dates to track growth. If stable over 12 months, they require no structural intervention.
Diagonal Stair-Step Cracks in Block Foundations: Indicates differential settlement. Warrants a structural engineer's evaluation if cracks are widening or if doors and windows are sticking.
Horizontal Cracks in Basement Walls: This is the red flag. Indicates soil pressure exceeding the wall's design capacity. Immediate engineering evaluation required. Do not begin any basement finishing work (see Finishing Your Atlanta Basement: A Complete Planning Guide) until this is resolved.
Foundation issues discovered during renovation require timeline adjustment — see What to Expect During a Full Home Remodel: A Week-by-Week Guide.
Bottom Line
Get a structural engineer's assessment before starting any basement finishing work in a home with cracks, and before any major renovation where doors or windows are sticking. A $500 engineering report is the least expensive thing you'll buy in a renovation — and it tells you exactly what you're dealing with before you commit to a project scope.
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