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Tanking and Wetrooms Forum
Waterproofing options for new shower room
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[QUOTE="Givey Tago, post: 990128, member: 61276"] Hi, A newcomer here and thank you to anyone with the patience to read my drivel. I am renovating an old stone house, have just finished a kitchen, and now need to install a first floor shower room (1.7m x 2.35m). The previous owner had the room to a state of green plasterboard walls, and chipboard floor. There are hot and cold feeds to one of the long walls, for a vanity, and hot and cold feeds - and evacuation - to the end wall, for a shower mixer and shower drain. I have yet to lift the chipboard but think it is installed on very thick (300mm square) beams presumably with shimming. I want to install a curb less tiled shower across the width of the room (1700mm). This will be partially partitioned by a half-height wall, and a glass screen. I think around 90cm deep leaving 80cm access into the shower. I shall install a vanity along the remainder of the long wall (spanning between the short wall with the door into the room, and the half-height partition wall for the shower). So a simple layout. And I would like to heat the floor and the shower floor. But most of all, I want it watertight! Cost is always an issue but it is a relatively small room and I am not a pro, so I would rather pay for reliability and ease. The various systems are driving me crazy and if I watch another YouTube shower video I may lose it altogether 🤣 The main choices appear to be Wedi or Kerdi/Schluter. My understanding is that I would need to… 1) Take up the chipboard, see what I have, but aim for a level subfloor of 22mm marine ply with the ply dropped between the beams in the shower area to accommodate the tray; 2) With Wedi, panel the shower area and 3ft beyond with 1/2” panels (effectively the whole area as it is a small room) - either over or in place of the plasterboard; 3) Build the partition wall by laminating 2x 1” sheets of Wedi; 4) Deck over the plywood floor with 1/4” Wedi (and plan the shower subfloor so it will still be flush) 5) Install a heat mat on the floor and in the shower; 6) Cover with thinset; 7) Tile floor and then walls. Have I understood the layers and sequence? Is Wedi a good option for me or should I be thinking Kerdi/Schluter (I do like the lapping and the reliance of Wedi on caulking seems more error-prone)? Or something else? Can I apply heat mat direct to the polystyrene shower base? My thinking is that the Wedi will waterproof everywhere and give me a slip layer above the plywood. I would have no slip layer in the shower but I guess I don’t need one as I am tiling onto the shower tray (over the mat set in thinset). Thanks for any comments, whether I am on the right lines or missing something vital! [/QUOTE]
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Waterproofing options for new shower room
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