please help us!!!! my husband is not at all new to diy and we have renovated thre houses in our 27 years of marriage and lived in them all happily till moving on.The problem is now he is losing confidence in himself and we are doing the bathroom for the 4th time in the same house and hopefully the last! The place we have bought the tiles for the bathroom have supplied us with soverign gripmaster adhesive and the tiles are 33x50cm,he tiled the shower area on sat 13th feb and we have noticed tonight that some of the tiles are loose at the corners so he has started to remove them,hence i have had tears,there is no adhesive on the back of the tles but the adhesive is coming off the wall by scraping,he has now given up as certtain areas need chisseling off. we really went to town to get this right and even put aquapanel in the shower area,what has he done wrong? advice really appreciated,thanks,maz.