Will be getting ensuite tiled for the first time, tiles are being delivered soon. All four walls are plasterboard skimmed and painted and floor is 18mm t&g chipboard, house is new build so bathroom never been tiled. I'd say id better check all plumbing before tiling, we've been in the house 3 years, bought new and ensuite has never been used....lol Ill be ripping down all four plasterboard walls, as have some electrical work to do and i know plasterboard isn't the best to tile on... Thinking 12mm marine ply for walls, is there much to installation, as can tackle it myself with right instruction. Do i just need to screw to joists, any expansion gaps to leave around edges...etc Also we have one of these shower pods in the bathroom, 900x900. Id say its impossible to remove plasterboard from behind the shower as ensuite is so small, but does this really matter? As said shower is 900x900 and the bathroom only is 1800x1200 Basically the tile sq m2 is 1.7m2 required for the floor and 9.5m2 for walls. Thats it tiled right to the ceiling.