preparing floor for travertine tiles - help

[chrisdenison]

I hope to complete in the next few weeks on a 1930's semi and have the idea of laying travertine tiles over the entire ground floor, approx 40m2. I have read a number of related threads on the forum regarding the preparation of floors but it would be very useful to have thoughts and recommendations for my specific situation. 80% of the area is suspended floor over which are the original floor boards, the remaining area is part concrete screed (small 1980's extension at rear) and a small area of original quarry tiles at front. The property has been fitted with UPVC double glazed front door (quarry tiles underneath) and french doors to the rear (concrete sceed underneath) . If I raise the levels too much I will impede both front and back doors. Read about removing floor boards and replacing with only 18mm/ 25mm wbp ply and tiling directly onto these to minimise height gain. Also heard mention in threads of decoupling membranes, ditra matting and backerboards. Any definitive answers please guys.

 

[swanman]

Hi

Some pictures would be good

 

[BARRONBATHROOMS]

Decoupling membranes will help over come the lateral movement in the floor but the floor needs to be deflection free first. Could you not glue and screw 6mm cement boards to the floor and use a fibre based slc over the quarry tiles if you can't remove them? I personally find it difficult to convince the Customer to pay out for a decoupling membrane unless there is ufh and it then becomes a necessity! A solid deflection free floor is always a good place to start with natural stone!

 

[BARRONBATHROOMS]

Just re read thread I personally would not tile directly onto ply with stone! Seen to many floors of this type fail!