Altro flooring?

[Louise89]

Hi
My wetroom floor has started to lift and I'm worried about damp/condensation getting to the wooden floorboards below.

I was wondering how to remove altro wetroom flooring? Is there anything that helps lift it easier?
It goes around the floor and up the sides of the wall and there's a wee black rubber thing that seems to seal it on to the wall? I know, awful description sorry!

Any suggestions is great!
I have a new floor to put down, would I need anything else to go under it or to purchase? Or would it be dear to get a new one fitted?

All new to me, sorry for all the questions
TIA
Lou

 

[dazlight]

Get a Pro in for that. Needs to be done right and hot welded in the corners.