Finally got a plumber to give a decent quote; so going to treat myself to having bathroom plumbed in.
Thing is, he's moving faster than I expected, which is no bad thing, but the floor is just exposed floorboard and he wants to know how much to allow for the base panel & tiles.
I charged down to the local tile place, who just baffled me with non committal randomness, but kindly offered to allay the confusion they had instilled in me, by offering to sell me some newfangled wonderful stuff that's only 6mm, strong as titanium etc (maybe it is), but to be fair, it was approaching closing time, so I left.
Two questions in my little noggin:
1) Is it very sensible to get the board down first and then fit pan/basin onto it and tile around these things later or may I as well just cut the base board around these fittings, as well as the tiles?
2) What depth ply do I really need? One plumber said 9mm, tile man today said 15m and the confirmed plumber was just talking something about 3/8th of a iinsh?
(and a cheeky 3rd, anyone used this 'cement' base board stuff?