Advice on travertine floor

[Gazzer]

I understand what you are saying but you can lay the mat on top or below...I think we are agreed on that now.
As for repairs if needed , high voltage is put through the system and by the use of a thermal imaging camera they can detect where the break is. Ok so you have to go through Ditra layer but having never had to do it , I aint worrying too much. :smilewinkgrin:

 

[aytiling]

I understand what you are saying but you can lay the mat on top or below...I think we are agreed on that now.
As for repairs if needed , high voltage is put through the system and by the use of a thermal imaging camera they can detect where the break is. Ok so you have to go through Ditra layer but having never had to do it , I aint worrying too much. :smilewinkgrin:

I actually had to do it once, guy from DK heating did the business for me and saved my bacon I can tell you. Gets my goat when there is so much BS written about what is basically not a very difficult job, then someone comes along and spouts more BS (British Standards) at someone with more experience than they have years on this earth.

 

[Gazzer]

I actually had to do it once, guy from DK heating did the business for me and saved my bacon I can tell you. Gets my goat when there is so much BS written about what is basically not a very difficult job, then someone comes along and spouts more BS (British Standards) at someone with more experience than they have years on this earth.

Yeah well thats the way it works sometimes, cant win at times.

 

[The D]

I actually had to do it once, guy from DK heating did the business for me and saved my bacon I can tell you. Gets my goat when there is so much BS written about what is basically not a very difficult job, then someone comes along and spouts more BS (British Standards) at someone with more experience than they have years on this earth.

:lol::lol::lol::lol:rrr:

 

[DHTiling]

Aytiling
Check schluter.uk and not schluter.com for uk spec.
Ditra can be used above or below.

 

[Matt]

According to Schluter, Ditra does not eliminate the need for expansion joints. Taken from the Ditra PDF:

"Movement joints:
Schlüter-DITRA must be separated at existing movement joints. If Schlüter-DITRA is used as a waterproofing layer, the joints between the sheets must be covered with Schlüter-KERDI-FLEX band.
Movement joints must be continued in the tile covering, as specified by the applicable industry standards. In all other cases, large area floor assemblies installed over Schlüter-DITRA must be subdivided into smaller fields with the help of movement joints. The distance between such control joints in exterior applications (balconies and terraces) should not exceed three metres. Depending on the construction of the substrate, field sizes may need to be smaller. Please refer to our Schlüter-DILEX profile series. Install the corresponding profiles such as Schlüter-DILEX-BT or Schlüter-DILEX-KSBT over expansion joints in accordance with the expected movements.
It must be assured that no tension can build at the edge of coverings, e.g. at upright construction elements or floor to wall transitions. The edge profiles and connective joints have to meet the requirements of the corresponding construction standards and must be suitable to prevent the build up of tensions. Please refer to our Schlüter-DILEX profile series."

My mistake and I apologise, you are correct that Ditra can be installed below UFH, but it is more effective over the UFH:

"Schlüter-DITRA may be installed either above or below the heating mat. However, the uncoupling function is more effective if Schlüter-DITRA is installed above the heating mat."

 

[micko]

Thanks for the answers.
Everything make sense to me now (to an expert would have made sense ages ago :lol.
So the procedure is: prime last layer of ply with sbr (should i prime even the top side to stop the moisture from the screed to warp the ply?), ufh, 2 part latex leveling compound, wait until completely dry, prime with sbr again, flexi adhesive (2 part or single part?)with a 4mm square notched trowel (should be enough since the level compound will be flat) then bed the ditra mat into it (pressing firmly, checking for coverage), then flexi adhesive (again 2 part or single? i would say 2 part) with a 10 mm half moon trowel, then bed the tiles (after back buttering)onto that as usual (i would love spacing to be 2mm as i dont like big grout lines..).
I was wondering how much height over the level compound all of that would add:4mm(ditra+adhesive), and then 18mm(12mm tiles plus the bed of adhesive that when pressed down will probably be 6mm), total 22/22 mm.
Are my calculations correct?
Sorry for asking so many questions..

Could someone answer this please I have a similar project on the go and an answer from someone with experience would help me as well. Is he correct?

 

[White Room]

It's the bit with ply and screed that lost me...

You should put in a new post with your query so many jobs are different.