Foundation crack guide

A crack’s pattern matters more than its appearance alone.

Some concrete shrinkage cracks remain stable, while displacement, widening, repeated leakage, or related movement can justify a structural evaluation.

Signs worth investigating

  • Horizontal cracking or inward wall movement
  • Stair-step cracks in masonry joints
  • A crack that widens, leaks repeatedly, or shows displacement
  • Sticking doors, uneven floors, or new gaps elsewhere in the home

What a careful evaluation should cover

  1. Record the crack location, direction, width, and visible displacement.
  2. Look for exterior drainage or soil conditions that may contribute pressure.
  3. Determine whether the repair is intended to seal water or restore structural capacity.
  4. Seek engineering input when structural movement is suspected.

Before approving work

Questions to ask the contractor

  • Is this a water-sealing repair or a structural repair?
  • What caused the crack, based on the inspection?
  • Should an independent engineer review it?
  • How will future movement or leakage be handled?

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