Laying a stone floor

[richardf59]

I am hoping to rip up some horrible parquet flooring that has been laid onto a concrete floor and replace with limestone tiles.
I have a total depth of 40mm so about 20mm of screed. I am concerned that this is not enough - my tiler says that he will add PVA to the mix to strengthen it up - would that be OK?
I know a latex grout would be good, but too expensive.
Does anyone have any ideas?
Thanks very much
Richard

 

[noseall]

you can actually mix up a strongish mortar and bed the tiles straight onto it. your mortar bed can be made up to 20mm easily. we used to do it all the time with quarry tiles.

 

[Jasonb]

I would not bed limestone in cement based mortar as it could stain the stone, better to bulk up leveling compound with granite chips then tile with a white floor tile adhesive.

Jason

 

[noseall]

I would not bed limestone in cement based mortar as it could stain the stone, Jason

fair point jason.

 

[Moz]

jase is bang on here ...