Foundation Cracks: Visible Warning Signs

Visible clues to document

Photograph both a close view and a wider view that shows location and scale. Note whether the condition appears active, repeated, recently repaired, or associated with weather or system use.

• Crack direction, width variation, displacement, and whether it crosses blocks, bricks, or adjacent finishes.
• Related sticking openings, uneven floors, wall separation, water entry, or exterior drainage problems.
• Prior patching, monitoring marks, new finishes, or changes reported over time.

What the clues may—and may not—mean

Similar-looking conditions can have very different causes. Surface appearance alone cannot confirm severity, concealed damage, material composition, structural movement, leakage source, or health risk.

Reasonable next steps

• Avoid entering areas with active movement or collapse risk.
• Document exterior grading, gutters, downspouts, and nearby water sources.
• Request an on-site assessment before covering, sealing, or relying on cosmetic repair.

Who to contact

For a property-specific assessment, contact a licensed structural engineer or appropriately qualified foundation professional. Ask for findings in writing and request a defined scope before authorizing invasive testing or repair work.