Wet Room Renovation (Walls Boarding & Concrete Bench Placement)

[MissBuilding1975]

Hi, Guys would like your advice and opinions please concerning my wetroom renovations.

I have stripped the walls back to bare brick and removed the previous concrete screed. Sadly, the previous screen was done by someone who didn't slope it correctly allowing water to flow out of the wetroom into the next room under the door.

1. I would like your advice please on what kind of boards (Waterproof boards) to use, please?
   
2. The brick walls are quite out, so I am in two minds whether to Dot and dab (Manipulate the board till level) and then support that with aqua panel screws into the brick wall or timber stud the wall (pack it) levelled, then screw the aqua board on there? What is your opinion on this, please?
   
   
3. The third question is, should I set up my concrete bench before or after creating the slope screed? I was thinking maybe after? because I could then factor the height of tile and adhesive into the height of the bench, though I could also do that before I slope screed. I just need to factor the highest point of the screed. Assumably this would also be easier as laying the concrete blocks on a flat levelled floor would be easier right. That way all I have to do is slope to the bench. Your thoughts on this, please.

Below is a photo of my wetroom stripped. Thanks in advance.

 

[23vc]

I’d batten the walls and use 12mm hardibacker/aquapanel. Once you’ve first fixed for the shower valve.
What’s the plan for the floor, a former kit or freehand screed? Is the gulley already installed? Not sure what you mean by bench

 

[MissBuilding1975]

I’d batten the walls and use 12mm hardibacker/aquapanel. Once you’ve first fixed for the shower valve.
What’s the plan for the floor, a former kit or freehand screed? Is the gulley already installed? Not sure what you mean by bench

It will be a free hand screed and yes drains already installed you can see in the photo. Just need to pre slope screed, then apply membrane, then a final screed before tiling.