I'm hoping someone can give me some advice. I live in a Victorian terraced house, in the basement flat, which adjoins the neighbouring property which also has a basement flat. Along the adjoining wall, there is a damp problem. On our side it hasn't been too bad, with damp rising only in a couple of areas, and only by a couple of feet. Apparently, the neighbouring basement flat which we adjoin along the same wall have had a far worse problem. We thought we had found the solution to our problem, cracked exterior rendering, which we are now having fixed. However, the neighbours have just had their flat tanked along the party wall, and apparently layers of concrete render applied to the internal wall. (these are the only details that i've been given of the work). I'm now slightly concerned about the effect this will have on our damp problem. Will the moisture be pushed more over to our side? What effect will this tanking have to our property? They didn't notify us as per the Party Wall Act, which is annoying, as we could have worked jointly. I suppose if there is a bad effect, we can claim against them? Any advice would be appreciated.