Was that because you had a freshly laid screed or slab though which just needed to dry out ?
I think in this case if I did that it would only be a temporary fix - this slab was laid in the 1970s so it would have dried out a long time ago. As the moisture vapour in the floor is the same in...
Self level over that (using moisture tolerant slc) to level it out, then ditra then tile I guess.
I wanted electric ufh for the tiles so was thinking electric ufh cables on top the ditra, but guess that could be a bad thing and make humidity worse as whilst warm air holds more water than cold...
Hiya, concrete floor under the backer boards. Must be a few voids of tile adhesive under the boards. Couple of places you walk you feel the backer boards compress down a little over a small area. I've just drilled, rawl and screwed one defelction area using the large metal board washers to pull...
Thankyou.
That's what I don't get, marmox boards are water proof yet the floor hygrometer on top of them reads 80% RH today at 20 degrees....and the Relative humidity in the floor will be even higher in winter when the floor is colder.
Tempted to spend a day, cover the shower glass and walls...
Ok thankyou. Do the channels in the underside of the ditra mat direct allow moisture to flow along their length? If so does that moisture end up going to the walls?
Oh is it?
No I checked for leaks underneath the tray. All seems dry.
All rooms concrete floor read similar 75+ RH with the hygrometer, give or take a couple of percent so pretty sure its due to moisture/vapour coming up from ground but the carpeted rooms deal with it obviously the vinyl would...
Measured the floor with a floor hygrometer, rained yesterday and the RH on top of the boards was up to 82%. Seems to sit about 70% without rain.
Tile and vinyl say 75% RH maximum permissible level So I definitely need some sort of moisture barrier.
Tiler is recommending using some self...
Thabkyou.
I've just removed the marine ply a minute ago. Ditra mat on top of those tile backer board still OK and will that stop the moisture coming up?
Renovated the bathroom on my 1970
bungalow last year. Took up the old pink floor tiles with sds. Chunks of what i assume is self leveller or maybe screed (?) came up with them.
Left with Concrete slab. laid insulated coated (cement topped) tile backer boards (marmox) using a thick amount of...