Foundation Crack Severity Quiz
Worried about a crack? Answer 7 quick questions and get an instant risk score with what to do next. No email required.
How wide is the widest point of the crack?
Use a credit card edge (~1/32 in) or a coin (quarter is ~1/16 in) for reference.
What is the shape of the crack?
Are the two sides of the crack offset (one side pushed in, out, up, or down)?
Where is the crack located?
Is the crack growing or changing?
If unsure, mark it with a pencil today and check again in 30 days.
Any signs of moisture, water staining, or efflorescence (white powder) along the crack?
Are there other warning signs in the home?
Pick the one that fits best.
How This Quiz Was Built
The seven indicators in this quiz (width, shape, displacement, location, growth, moisture, and accompanying symptoms) are the same factors a licensed Professional Engineer evaluates first when triaging a foundation crack on-site.
Hairline vertical cracks under 1/16 inch are extremely common and almost always cosmetic. Horizontal cracks, stair-step cracks wider than 1/4 inch, or any crack with measurable displacement signal something different - typically active structural movement that should be evaluated quickly.
When in doubt, mark the crack ends with a pencil today and re-check in 30 days. If you see growth - or you scored "Moderate" or "High" above - schedule a licensed PE on-site for a definitive answer.