Hi, We would like to put a made to measure mirror in our bathroom on the top half of one wall to make it look bigger but I don't really want those ugly fixing screws with plastic caps. Can anyone advise how to attach the mirror to the wall with invisible fixings or some kind of mirror friendly glue/grout? Also I have seen some border tiles that are made from natural pebbles but was wondering how good these would be when exposed to running water from the shower. Do they soak the water up? I wouldnt want any leaks into the kitchen below!