Floating floor meeting Screeded Floor

[Hughxxxxxx]

Hi,
We have just completed a recent extension.
The existing 1970 build has a concrete floor and in the additional extension - we have used a 60mm Celotex and intend on putting to 22mm T&G flooring chipboard on it.
What I'm wondering is the line where the original concrete screed meets the floating floor - is this going to show at some stage in the future ? Is there anyway of reducing the chances of this.

The floor will have a good underlay on it and carpeted.

Thanks in advance for any advice...

 

[RichardJohnson1]

It shouldn't do if there is no movement.