Don’t step on a crack or … Actually, this is a vertical crack. IN THE FOUNDATION. Keep your eyes peeled for tell-tale signs like this that could affect the stability of your current or prospective home. When walking around the exterior of the home and when looking inside the crawlspace (if you can get in there, you should), pay very close attention to the condition of the foundation walls. Stepping cracks, horizontal, and vertical cracks can all indicate potential problems. Sometimes these are easily fixed but sometimes the repairs can be quite costly. Our home inspector will locate and identify these types of issues so that you can make an informed decision about the next steps in the buying process.