First floor tiling over wet underfloor heating. - Tile Advice

[Middlesex Tiles]

I have a customer who wishes to tile their entire first floor over wet underfloor heating.

The ufh is between joists, with a biscuit screed on top. How would you guys then prepare this to be tiled?

Whole area is approx 80m - 4 bedrooms, 2 bathrooms and landing. Tile will be a porcelain plank - 900 x 225.

I am supplying tiles - not tiling it - I leave the skilled stuff to the experts, but I want to ensure that customer has a trouble free installation.

 

[Ajax123]

Will depend on how nhow much deflection there is

 

[Flintstone]

how thick is the screed? Is there a layer part way down the joist level to contain the screed?

 

[Middlesex Tiles]

Could this be a solution?

1200x500x22mm STS Construction Board T&G Cement Board (HALF SIZE) - http://www.sts-uk.com/1200x500x22mm-nomoreply-t-g-cement-board-half-size

An alternative to Hardiefloor?

 

[hmtiling]

Could this be a solution?

1200x500x22mm STS Construction Board T&G Cement Board (HALF SIZE) - http://www.sts-uk.com/1200x500x22mm-nomoreply-t-g-cement-board-half-size

An alternative to Hardiefloor?

Used this before and it's good stuff. It needs to be glued and screwed and primed. If the joists are in good condition and not miles apart I'd say it was a good solution, especially as 22mm hardie is no longer available. Give nmp a call to discuss/spec it though