Bath Shower wall prep after tiles fell off

[Andrew 101]

My bathroom was tiled 5 years ago with 60x30 tiles which became loose and came clean off with a little wiggle. The installation was prior to when I moved in. The walls look sound and flat and seemed to have been newly plastered before the tiling was done.

My question is what do I need to seal the walls before retiling, happy to go over the top so i don't have an issue in the future.

This behind the bath and shower.

Many thanks in advance.

Andrew

 

[Slippery]

The wall was not primed prior to fixing so the adhesive has only bonded to the dusty surface.
I would remove the lot as it's been spot fixed and will not last, get some tanking paste and give the whole wall at least two coats, this will waterproof and prime the walls, use a full bed and lightly butter the back of each tile to ensure 100% contact with the adhesive.

 

[Andrew 101]

The wall was not primed prior to fixing so the adhesive has only bonded to the dusty surface.
I would remove the lot as it's been spot fixed and will not last, get some tanking paste and give the whole wall at least two coats, this will waterproof and prime the walls, use a full bed and lightly butter the back of each tile to ensure 100% contact with the adhesive.

Hi Slippery

Thanks for the advice, can I ask a few more questions;-

The plaster looks polished, should I key it, if so and what's the best way?
Tanking Paste, any recommendation on brand/type?
Do I need to use Bond SBR as well?
What would be the best type of tile adhesive to use ( tiles are 600mm x 300mm x 10mm)

Thanks in advance

A

 

[Slippery]

1, the tanking solution will take care of that and is a primer in itself
2, I think Screwfix do a mapei kit with tape and corners by Mapei for about £45
3, no, see 1
4, much of a muchness really, my favorite is adesilex p9 because of it's workability but any powdered slow or medium set will be fine, be sure to spread and butter!

If you haven't been taught how to spread, watch this video, it's very informative!
View: https://www.youtube.com/watch?v=Way5bMh-eYg

 

[Rutters]

Hi,
Remove tiles, scrape of old adhesive. If plaster is polished then you need to key in by rubbing the surface with rough sand paper. There are other ways which you can research.dust off. Wipe down and prime with an acrylic primer following manufacturer guidance. You won't need to tank the whole bathroom. You only need to tank the shower area. Tanking kits provide an acrylic primer. The tanking mixture itself is not a primer. The walls still needs to be primed prior to applying the tanking mixture. Once dry you can then tile away making sure you use the appropriate adhesive and grout.