Small hairline cracks are usually normal and not a major concern, but cracks wider than an eighth of an inch, or cracks that are growing, spreading, or appearing in a stair-step pattern, are signs that warrant a closer look.
Warning signs that suggest a bigger problem include:
- Cracks wider than 1/8 inch
- Cracks that continue to grow or spread over time
- Diagonal or stair-step cracking, which can indicate foundation movement
- Cracks accompanied by soft spots, discoloration, or musty odors
- Cracking near windows or doors, which may point to water intrusion
Hairline cracks from normal settling or minor temperature changes are common and typically don’t require immediate repair, though sealing them early helps prevent moisture from getting in.
If you notice larger cracks, especially ones connected to signs of water damage or structural movement, it’s worth having a professional inspect the area. Catching these issues early usually means a smaller, less expensive repair instead of a major structural fix later.