Is it best to tile a wall first and then abutt the shower tray up to the tiles. Or install shower tray up to plastered wall then apply the tiles so the edge of the tiles are on top of it.
Apart from sili sealant, how can I ensure a 100% leakproof joint. My experience of baths, is that over a couple of years or so they leak.
Also tray waste only comes with one large rubber washer, which side of the waste does it go, between the big nut and the tray, or tray and top of waste ??