plasterboard bathroom tanking waterproofing

Hi, apologies if this is the wrong section. I'm in a bit of a pickle, our shower has started leaking, a lot, and it looks like there had been a small leak for a while that soaked through the grout (or round it) and destroyed the plasterboard behind it, this in turn allowed movement which made...

We have a downstairs bathroom that has seen better days, built in an extension which, our surveyor said, isn't great quality and should eventually be pulled down. We do plan to do this, but it will probably be 5 or so years before we're able to afford to replace it with something better. So, in...