Can someone please advise me on what's the best way to lay a low level stone tray (1400 x 800) on an un-level concrete floor? it's low by about 6mm on three corners. I've dug a channel to take the trap and waste. I've already tried with a bed of sand and cement but couldn't get it completely level so took it up and scrapped the sand/cement. Any advice would be very gratefully received, this is giving me insomnia!
Best way to lay low level shower tray on uneven concrete floor
- Thread starter Ttron
- Start date
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Expanding foam, i laid one in a former house. Was a low level tray but built up slightly on a wooden frame to give extra room for the waste.
Was incredibly solid and never gave me any trouble. Would suggest priming the concrete first but you should be able to level it and keep weights on it once in position
Was incredibly solid and never gave me any trouble. Would suggest priming the concrete first but you should be able to level it and keep weights on it once in position
Thicker bed of sand and cement 5:1 and furrow it... Don't make it so pi$$y that it oozes out the sides everywhere.
B
Bodd
I did that once to fill a channel under the tray. Come back in the morning and the tray was up in the air.
Should have put some weigh on the tray I think.
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That's exactly what I did and the weight of the tray compacted it before I could get it level.
That's what worries me about using foam. How to get and keep it level while it dries.
This way would be fine if I wanted to raise it a bit as you did, the timber frame would supply the levels, but I need to keep it close to the concrete so the bottom of the tray stays below the tops of the floor tiles, when they are laid.
I'm sorry but I just can't get my head around using expanding foam to take a reasonably large shower tray. I wouldn't ever consider using something that isn't designed to be load bearing, longer term.
On a concrete base that can't be raised on a plinth then it's really got to be sand and cement or a good waterproof tiling adhesive to ensure its lasts. I'd be using plastic/wooden wedges to level and support it whilst it sets. A nice firm mix as @dilalio suggests so movement is minimal.
On a concrete base that can't be raised on a plinth then it's really got to be sand and cement or a good waterproof tiling adhesive to ensure its lasts. I'd be using plastic/wooden wedges to level and support it whilst it sets. A nice firm mix as @dilalio suggests so movement is minimal.
I always used floor tile adhesive of good quality.
My favourite is bal, but it's just personal choice
My favourite is bal, but it's just personal choice
A tip from an old plumber which I've used successfully was to mix up a bucket, of soft plaster then bed to tray onto that. The plaster is strong enough yet soft enough, to permit tray levelling. Once it sets ( an hour or so), job done.
If you know how to guage sand & cement, it's a no brainer... And also fulfills MI's of every tray I've ever laid that specifies such. 
D
dontbelieveawordofit
tile adhesive
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