moving tiles,,,headaches

[Ceramico tiling]

Do tiles level themselves out slightly?Because today I had to lay a floor at a very light slope to meet up with the carpet in the adjoining room but When I rechecked the first few tiles it was noticable how much they had moved,as I used rapid set i landed up with a slightly unflat floor.I used mappei,and there was not more than 5-7mm adhesive under any tile as I had already smoothed the floor.Any ideas as to the cause or how to prevent it,because I am confuzzed!!

 

[DHTiling]

Adhesive was probs to wet.. this can cause it to slump..


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[DHTiling]

Ha.. looks like you have managed..

 

[Spud]

unfortunately when you start bedding tiles up 5-7mm ,the tiles sit up on the adhesive and for all intents and purposes are really floating there, when another one is placed beside it the extra adhesive effects the bedding of the one beside it, it takes a lot of practice to get used to putting the right amount of adhesive on the tile when back buttering to achieve a solid bed and a flat floor ,sometimes you will even have to beat the tiles flat using a mallet or slide the tiles to squeeze the excess adhesive up and out through the joint to achieve the flatness you are looking for

 

[hillhead]

i was laying heavy 800x800 porcelain today,i had to be very careful of slumping as the floor needed a bit of work too.A couple of tiles i had to wedge just to protect from slumping.

 

[Spud]

we sometimes use wedges when fixing large slabs 20mm stone flooring to prevent slumping too

 

[Ceramico tiling]

Thanks..They were 15mm stone tiles and quite heavy,

 

[Ceramico tiling]

I think you guys saved me allot of trouble with the info,as I have a wonky kitchen floor to be done in 20mm stone.Usually I just butter up and level as I go but today I levelled the floor nicely with levelling compound first.

 

[doug boardley]

we sometimes use wedges when fixing large slabs 20mm stone flooring to prevent slumping too

so is that a bit like using lash clips Gary, not to prevent lippage but to prevent slumping?