Shower room floor in frame construction?
JohnWalker
| Posted in Construction Techniques on
I am considering building a Japanese style shower room with shower and free standing soaker tub on a frame floor. My concern is obviously waterproofing and well as construction details to slope such a floor (surface would be tile with epoxy grout over KERDI membrane). Would perfer to avoid massive mud slab if possible. Does anyone have any experience with this type of room? Thanks John
Replies
IMO it'll probably be easier
IMO it'll probably be easier to do the preslope with mud than to try to frame the floor with the slope. Hire a tilesetter with the mud skills.
just finishing doing exactly that .. I ran diagonals from the four corners of the room to the floor drain, then ran cant strips across the joists btwn the diagonals, layed t&g ply overtop of that, cutting about 1/3 of the way through over the diagonals to allow it to lay flat. Set heating cable on the ply, skimmed with mortar, then waterproofing membrane then tile. No raised thresshold at door the whole room slopes to the drain.
Wane's job
Wane
That looks like what i was thinking of.
Are those diagonals lap joints or are they cut into the tops of the joists?
I am thinking with some planing you could rip the slopes on the joists BEFORE installation. The diagonals could be applied after.
Exactly what membrane did you use?
Do you have any additional photos?
Sorry my email notifications was turned off in my profile for some reason and i didn't see any other these replies until now.
John
The kerdi sloped pan is 1.5 inches high at the edge of the 72" square pan. If your shower is wall based w/o body sprays, then using ditra (with kerdi-band at the seams) will make a waterproof floor beyond the pan.
If further sloping is needed, then you may need to drop the sub-floor flush with the joist tops in the shower area... a LOT of work..
Problems with toilet setting and door thresholds arise quickly with fully sloped floors in rooms of any size
HerrBag
I have considered the 72" square Kerdi pan. What is your experience with these like?
What is the street price of these?
They appear to be styrofoam - do they arrive beat up?
Thanks
John
Last year we did a shower that was about 10' x 10'. Two shower heads and a freestanding bathtub on one side of the shower. Sounds something like what you want.
Our tile guy did a mud preslope with Kerdi over that. Marble tiles with epoxy modified grout, not full epoxy. We kept the drain close to the showerheads, not the center of the room, so the slope is greatest where the amount of water is greatest.
Our tile guy does not love Kerdi, would have preferred to use a PVC liner, but with a room that big the extra layer of mud would have been too high. It was a remodel so we didn't drop the floor joists. If it was new construction we would have.
Mike, it sounds like your outfit does some badd-azz projects.
look into hydroban by laticrete, waterproofing membrane