Plasterboard and stud question

Horusire

Hi guys.

Filling in one door of a jack and jill bathroom to make it a normal ensuite. I have removed the door frame and architrave exposing the stud and plasterboard.

The door is right near a shower so to the right of the door is a mositure resistant plasterboard and to the left door space is standard plasterboard.

They seem to be different thickness's. Id guess the thickness of moisture proof is 12.5mm and the plasterboard is 10mm. I am planning to tile over the entire thing afterwards.

My question is what do I place over the studs I'll fit in afterwards? How will I match both surfaces ?

https://ibb.co/JyrdMDs
https://ibb.co/5YfLFg5
https://ibb.co/mSx823x

listermint

It's probably 9mm board .
. Take down the 9mm and Replace with 12.5mm across wall, old door and to meet the green board

Calahonda52

As you PB or ply or whatever is going both sides and not spanning across the ope, you are 99% certain to get an expansion crack when it all settles, I would put a vertical edging bead along the two joins and tile in-between, you wont see the difference.

Without a continuous substrate across the new and old stud, I would not tile across the joins

Horusire

Calahonda52 wrote: »

As you PB or ply or whatever is going both sides and not spanning across the ope, you are 99% certain to get an expansion crack when it all settles, I would put a vertical edging bead along the two joins and tile in-between, you wont see the difference.

Without a continuous substrate across the new and old stud, I would not tile across the joins

Thanks to both of you for the input. Cala can you explain what your mean by a vertical edging bead please. Like a bead of filler or silicon in between there the new plasterboard meets the old?

When you say you wouldnt tile across the joints do you mean that you dont have a tile whos middle is the vertical edging bead? Thanks

listermint

What does the over door junction look like though? That's pretty important as it shows the transition

Horusire

listermint wrote: »

What does the over door junction look like though? That's pretty important as it shows the transition

You must have some pain in your neck carry around that massive brain of yours ! How didn't I think of that lol

I'll take the tiles off and report back tomorrow. Thanks for the input

DublinDilbert

Take off the piece above the door and re board from floor to ceiling. The plaster board will be that length anyway. Also less chance of it looking like a door when it's plastered / jointed.

stoneill

Tape the final joints with several strips of tape overlapping to make the transition from old to new. Plaster until transition is invisible then plaster entire wall with final skim

listermint

stoneill wrote: »

Tape the final joints with several strips of tape overlapping to make the transition from old to new. Plaster until transition is invisible then plaster entire wall with final skim

Seems like an awful lot of work for tiling afterward .. be cheaper and quicker to throw up new board and not skim any of it.

the_pen_turner

i would take all the slabs off. ply the wall and moisture slab the wall.