Ok iscrewed up a simple job of laying 22mm caberfloor

[redtop]

Laid a 22mm chipboard floating floor, sits on 25mm PIR. Used 25mm battons at door entrances and now find the floor rises a few mmm at the threshold. Short of cutting and lifting the offending area, could I sand /plain the board down to remove the Hump. Its the 22m p5 stuff

[PeterW]

What’s the finished surface going over it ..?

[redtop]

1 hour ago, PeterW said:

What’s the finished surface going over it ..?

Engineered wood boards

[ProDave]

Is the root of the issue that your "25mm" battens are thicker than your "25mm" insulation?

 

Just trying to understand what has happened, not having a solution, sorry.

[tonyshouse]

Or has it cupped up, is it springy? Can you pull it back down with long screws? 
 

last resort is planer it