I'd be the first to admit, I don't know Jack about basements because they are not common here. Never seen one or stepped foot in one.

Always looked like a bad idea to me just looking at the design and the construction of them I've seen in videos and pictures.

You build something which is underground and its walls are of concrete, you would just have to expect some movement of those walls and the always possibility of moisture intrusion.

Have you ever seen water-proofing done that you could say that would be always water tight? I don't think so.

The same principle goes for swimming pools though. Dig a hole, pour and shape the walls with concrete, fill it full of water. The only thing is you hardly ever hear that swimming pools are leaking below the surface that much. Is the plaster sprayed over the gunite that tight to prevent water seepage. If so, why do they not spray the walls of basements with this same material instead of using some tar base product that we all know cracks, splits and allows water seepage.

Curious minds would like to know.

rick