My family and I have just moved into a duplex that we’re renting. The house is joined to another house. We share one wall with the other house. We’re not in a row of townhouses.
I’m not a structural engineer, but have concerns about the foundation of the house. I’ve heard that horizontal cracks are bad in a foundation and we have some very long ones in the foundation that span the length of entire walls. One of these wall long cracks on one of the west walls extends right into the south wall and continues on. I’ve attempted to attach pictures of this particular crack to this post, but seem unable to.
The cracks have been patched/filled with concrete at some point, and it looks like the filled concrete has been sanded down to smooth it out, so it’s really hard to tell how wide the cracks actually are. The foundation walls don’t appear to be bowing, but I’d like to understand better whether or not the cracks are dangerous. There’s also vertical cracks in the foundation.
I know it’s hard to judge from just photographs, but are these cracks dangerous, considering that the walls are flat and flush? What’s the difference between a horizontal crack that’s dangerous and one that’s not? Or are all horizontal cracks something to be concerned about?
Thanks in advance to anyone who takes the time to reply.