Existing floating floor and new ufh screed dilemma

[lewie]

A new ufh screed is going to be laid in an extension. The existing flooring is a floating floor with plenty of 'bounce'. Customer would like both floors tiled. Old floor is approx 70m2 and the new screed is approx 30m2.

Is it possible to do this as I don't think cost is an issue?

Lewie

 

[Flintstone]

If there is bounce and it’s a floating floor, it’s not suitable for Tiling! Floating floors are notoriously bad

 

[Dumbo]

Cost no issue . Get it screeded throughout .

 

[lewie]

The underfloor is concrete block. No insulation. I'm thinking of removing the floating floor and adding a 50 mm tile backer board, eg Marmox or Orbry and then 22mm No More Ply on top. Is there any other recommended solutions out there ?

 

[Dumbo]

If youre doing that i would 50 then 20 marmox or whoever