Evening,
I've got some LVT flooring in my hall and tile in my kitchen, between these two was a huge piece of wood for a threshold that my kids constantly trip over so I have removed it and plan on screeding/using some flexible type of concrete etc then using some of the spare LVT to put over the top and hopefully with a bit of work create a much smoother transition between floors (height is about the same, tile maybe 2mm higher)...but I've hit a snag...

There is this plastic sheet stuck in the concrete floor under where the existing wooden massive plank threshold was ..would you cut it out and screed/concrete over, or leave it in place and screed/concrete over it? Worried that if I leave it that whatever I put on top won't adhere properly to the plastic?
Cheers for any help.
I've got some LVT flooring in my hall and tile in my kitchen, between these two was a huge piece of wood for a threshold that my kids constantly trip over so I have removed it and plan on screeding/using some flexible type of concrete etc then using some of the spare LVT to put over the top and hopefully with a bit of work create a much smoother transition between floors (height is about the same, tile maybe 2mm higher)...but I've hit a snag...

There is this plastic sheet stuck in the concrete floor under where the existing wooden massive plank threshold was ..would you cut it out and screed/concrete over, or leave it in place and screed/concrete over it? Worried that if I leave it that whatever I put on top won't adhere properly to the plastic?
Cheers for any help.