Prepping bathroom walls for tiling

24 Feb 2024
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United Kingdom
Im about to rip out my bathroom for a new install. I dont know the state of the walls prior to removing as theres tile on tile.

Preferably i would like to remove everything back to brickwork and start from scratch.

Im looking for best way to prep walls and floor for tiling on both.

Walls- am i ok in thinking dot an dab MR plasterboard to the brick work and studs (1 wall) if i use MR board will i have to prep it before tiling or go straight onto it?
And in the shower area can i tank directly onto the MR plasterboard?

And for the floor use 22mm water risistant t&g 8x2 with flexi tile adhesive and grout?

Any pointers are greatly appreciated tia.
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Take it back to brick, that will offset the loss of space from dotting and dabbing. It might be much but if you're fitting in a bath or shower next to a door, a few mill can make the difference.
Thats what i intend to do. To maximise the width as its 1700mm and i need to fit a bath in one end.

Would i be ok tiling directly onto MR Plasterboard with rapid set adhesive? BAL or Mapei? Or do i need to prime?or would there be a better option for preping other than dot and dab plasterboard
Cement board or hardibacker seen plenty of plasterboard failures however they were prepped .
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Have a think about insulation (if any of the walls are outside walls). You can tile direct to brick or block. If you are boarding out you'd ideally use cement or marmox or something not plasterboard for the 'wet' walls (shower end and side of the bath)
Line the walls with cement boards.
Spend some time levelling the boards perfectly and tiling will be a breeze.

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