 Yeah, so how do you determine if it's a major crack or something that you can fix? Well, one way to tell is the direction of the crack. Is it vertical, horizontal? Is it diagonal? And is the crack static or not moving? Because if it's not moving, those are usually small hairline cracks vertically. Sometimes they're randomly oriented. And these type of cracks can be repaired fairly simply, and they don't extend to the full thickness of that foundation wall.