Maintenance Guides / Exterior & Structure

Inspect foundation for cracks

Difficulty: easyTime: 30 mins

Why it matters

Hairline cracks are normal in concrete. Wide cracks (>1/4"), horizontal cracks, or cracks that have grown since last inspection can indicate structural movement that gets worse and more expensive over time.

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How to do it

  • 1

    Walk the exterior foundation line — look for cracks, bulging, or horizontal displacement.

  • 2

    Check the interior basement walls for cracks, white mineral deposits (efflorescence), or moisture.

  • 3

    Mark any existing cracks with a pencil and date — monitor for growth.

  • 4

    Horizontal cracks or any crack wider than 1/4" warrant a structural engineer inspection.