Cheers, I can add some sealant thanks. A test pit is an idea, I can get a builder to do that. Space may be an issue mind. I think there is some subsidence otherwise there wouldn't be a crack but who knows. Not even sure the SE would know without digging.
The other thing I could do is forget about it and when I add to the extension to box it off with the separate kitchen fix and inspect the foundation then.
The other thing I could do is forget about it and when I add to the extension to box it off with the separate kitchen fix and inspect the foundation then.
