Following a significant leak from a shower over a bath, I'm currently ripping off rotten plasterboard and have Knauf Aquapanel (cement) boards to go up onto the studs. As a belt and braces approach (I'd rather spend the extra for peace of mind) I'm planning to tank the area too. So, am wondering what tanking system you guys recommend over the Aquapanel? I've read a few posts which suggest you need a layer of tile adhesive first? Is that only is using the sheet membrane tanking such as the Homelux? I was thinking of using the BAL tanking, or the Dunlop kit. Any advice appreciated. Cheers, Gareth