Substrate for shower area

[Ttt1601]

There are loads of houses here with this wall construction. There is no stud, it will be a 1 inch plasterboard, secured top and bottom with battons then 12.5 mm pb dot and dab either side, you can re fit dot and dab pb then tank, or build a stud framework and install whateverboard you want.

 

[Blunt Tool]

I'm sure there's an app for that! 🙂

Question or statement? 🙄

Might go on dragons den with that one 😉

 

[Drainage by Design]

Scrap the hardie, just use a waterproof board instead

Whilst I'm no fan of plasterboard (or plywood) in wet areas. the plasterboard MAY be a component in fire compartmentalisation.
"Waterproof board" usually implies foam core 'tilebacker' material.
However, Grime is going to put tanking on the substrate under the wall finish.
THAT is the layer that is the key to a longlasting and non-leaking wetroom.
Or as I put it to people "make sure you build just the one wetroom - don't include the room below".
Plasterboard can be OK .If the tanking is done properly. II's very cheap and easy to use.
Hardieboard doesn't react so much to water leaks.
But make sure there are no water leaks ......

 

[Grime]

Thanks to all of you for your comments. The customer has agreed to get a chippie to build a timber frame.

Thanks.