Ditra or not

[kaharrison9]

Cheers for that.

It is more on the lines I'm thinking.

One thing that I have often thought about is I believe that cement boards do not expand or contract like wood so if the case what use would Ditra ever be on top

 

[One Day]

If the newly laid chipboard has had time to acclimatise to the house and it's not a brand new - never been heated house with new joists - then I see very little risk of timber movement affecting the floor.

 

[kaharrison9]

The joists will be half old of the house and half new of the extension but the new chipboard was put down 3 months ago onto the old and new joists. It is an empty house.
I wonder what happens to cement board when timber moves as the cement board will not move at the same rate?

 

[Time's Ran Out]

I would have expected 86 sq mts of tiles to have a considerable affect on a chipboard floor!

 

[kaharrison9]

In what way John.

Overboarded with cement boards as well.

Cheers