Tanking wall beside bath

[Mossop]

Plywood has no place in a wet area, tanked or not.

Does the statement above contradict the statement below? Or by "wood" (below) perhaps you mean wood other than ply? If you could clarify, it would be appreciated. Thanks.

Wood is often ok if it’s behind a waterproof surface

 

[Qwerty]

Does the statement above contradict the statement below? Or by "wood" (below) perhaps you mean wood other than ply? If you could clarify, it would be appreciated. Thanks.

Yes, not worded well but I know what he means. Wood is far more susceptible to thermal movement, swelling etc. It is best avoided in a wet area as there are far superior products out there. Waterproof, structural tanking boards are available which will be more suitable.

 

[Flintstone]

Sorry, what I meant was if he wants to install some wood to the stud work before over boarding so there is a secure fixing in there for things to screw to that’s ok.

 

[Mossop]

Waterproof, structural tanking boards are available which will be more suitable.

Do you mean, for example, hardiboard?

 

[Qwerty]

Do you mean, for example, hardiboard?

Aquapanel, Hardibacker & no more ply are water resistant but not waterproof.
A structural waterproof tanking board such as wedi, schluter, marmox, orbry, jackoboard are the better choice.

Is the shower backing onto a stud wall or airing cupboard?

 

[Mossop]

Below is a plan of the bathroom, showing the locations of the bath, and one overhead shower and one wall-mounted dis-mountable hand-shower.

As I've indicated on the figure, there is a brick wall at one end, the side wall is a stud wall which will be plasterboarded and tanked.

What about the short wall on which a hand shower is mounted (this open alcove runs floor to ceiling)? Do you suggest?

a) Tanked plywood sheet
b) Tanked Hardiboard sheet
c) Tanked plasterboard sheet, with a timber frame directly behind the hand shower
d) Other

 

[Mossop]

Is the shower backing onto a stud wall or airing cupboard?

I just saw your post after I posted the above. It's backing onto a stud wall (on the landing - top of the stairs).

A structural waterproof tanking board such as wedi, schluter, marmox, orbry, jackoboard are the better choice.

By "structural", do you mean these boards have some inherent strength to them (unlike plasterboard) so objects such as hand showers can be attached to them

 

[Qwerty]

Yes, but to fix items to the wall you will still be better off with some structural support. You are fortunate that it's a stud wall. You can always use CLS timber inside the stud wall to provide the support you require. You will be absolutely fine using tanked plasterboard with timber supports inside the stud wall.

In short, C 😀

 

[Mossop]

What's CLS? Edit: It appears to be Canadian Lumber Standard.

I found out that it is possoble to purchase Schluter Kerdi-Board locally. In case that was used, I suppose the 9mm thickness is the one to go for to adhere tiles then a hand shower to? Do you think this would still require some structural support (i.e. timber frame)?

 

[Qwerty]

I would still opt for timber support.

Yes, CLS does stand for Canadian Lumber Standard (carcassing timber) .... everyday is a school day on here! 🙂