Concrete Crack Checker: Seal It, Watch It, or Call?
Answer five questions about your crack and what rain does to it. You'll get one of three answers: keep an eye on it, seal it before the next storm, or have it looked at. It takes about a minute, and nothing you enter leaves this page.
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Not sure what you're looking at?
Text us two photos: one straight down at the crack with a coin next to it, and one from the side so we can see any height difference. We'll tell you what it looks like before you spend anything.
Is today a good day to seal a crack?
Most crack sealants need a dry crack, a slab that's comfortably above the dew point, and no rain while they cure. Plug in today's numbers. The defaults come from published product sheets, so change them to match your label.
Common questions
Is this checker a substitute for an inspection?
No. It sorts common situations based on what you can see from the surface. It can't see the soil under the slab, the steel inside it, or how the crack moves over a season. Treat the result as a starting point for a conversation, not a diagnosis.
Why does the checker care so much about rain?
Because water is what turns a crack into a bigger problem. Runoff that drains into a crack softens and washes out the soil holding the slab up. A crack that stays dry is mostly cosmetic. One that acts like a drain is a slab that is losing support.
Where do the weather check numbers come from?
The defaults are examples from published crack repair product sheets: one asks for the slab to be at least 5°F above the dew point, and one asks for no rain expected for 24 hours. Your product may be different. Change the numbers to match your label.