Tanking wall beside bath

[Bond]

You could fix ply to studs overboard with plasterboard, then tank. Good for fixings and adds rigidity to the wall.

 

[Mossop]

You could fix ply to studs overboard with plasterboard, then tank. Good for fixings and adds rigidity to the wall.

That's interesting. I do have some sound resistant plasterboard.
Do you guys think securing plywood directly to the studs, then securing this plasterboard on top, then tanking the plasterboard would most likely eliminate any risk of thermal movement or swelling of the plywood?

That is, only on the angled wall shown on my above diagram which has a red arrow pointing to it.

If there's a full ply wall here, it does leave open the option of securing other things to it e.g. a shelf/shelves or a basket for toiletries etc.

 

[Bond]

If you screw ply and plasterboard to the studs and follow instructions on the tanking kit, there should be no foreseeable issues at all.

 

[Qwerty]

Would the build up of the layers cause an issue with door frame, architrave etc?

 

[Mossop]

Would the build up of the layers cause an issue with door frame, architrave etc?

There is no architrave, and this would only apply to the angled wall indicated on my above diagram with a red arrow. There is no door on that wall so there would not be any issues with regards to a door frame either.

 

[Mod]

I was just wondering which of the many options you would use when putting up new board on the wall which runs the length of a bath with an overhead shower above the bath?

That is, a wall currently with nothing attached to the stud.

Options appear to be putting up ordinary plasterboard, or plywood, or Hardibacker or AquaPanel or some other cement-based board.

Tanking: do you use the paint-on tanking products or do you use an overlap matting system?

I'd be interested in hearing which method you would use, and if you have any particular reasons as to why you'd choose that substrate and tanking or matting finish?

Thanks.

I allways use aquapanel or similar if theres a shower and its a stud wall