Indian stone flags on top of screed including underfloor heating.

[markyboy69]

Hi, anybody who has laid Indian stone flags will know they easilly lift, I always P.V.A the back before laying and this works, my question is - has anybody laid them on sand/cement bed on top of a sand/cement screed with underfloor heating in ? My fear is that the rise and fall of temp may make them lift ? Cheers.

 

[stonegallery]

This is a tricky one , more info please ... Is the screed heated by a plumbed in water sysytem , is the screed anhydrate ? , how long has the screed been down and how thick ?

 

[White Room]

Don't use pva.....http://www.tilersforums.com/tile-adhesive-grout-substrate-preparation/2511-p-v-versus-primers.html