Various bits of advice needed! - Tile Advice

[Graham71]

Hi all

Am in the midst of redoing an en suite and have a couple of queries I could do with some advice on!

Have attached a picture below of my wall! Flooring is done using back buttered powder cement - all good I think! Am using the same cement (mapei Fast set) on the walls too.

Right hand side of picture is tiled onto aquapanel as inside shower enclosure... Lefthand side is toilet and cabinet.

As you can see it's painted with what I guess is either silk or bathroom paint.... Do I need to key score sand or remove ??

The plasterboard below is normal, primed 4:1 and tiled so again hopefully all OK... The other question is grout based... Have bought premixed - will that be OK for both areas or is there a reason i should use powdered grout??

Any advice much appreciated!

The white blob on the wall is where I stuck a random cutoff to test... It held pretty firm but on iously didn't bond with the plaster underneath probably more just the paint!!

FYI tiles are 30 x 20 x 9mm ceramic

Thanks in advance !

 

[Graham71]

Dropbox - 20181126_204059.jpg - https://www.dropbox.com/s/n28vpmg4hun6qgj/20181126_204059.jpg?dl=0

 

[Boggs]

Can I ask if this is your own ensuite?

 

[Graham71]

Well my partners !

 

[Boggs]

Would be best to remove the painted plasterboard.
No need to prime the new plasterboard.

 

[Graham71]

Thank you... Remove the whole piece of plasterboard or the pain of it

 

[GoneGuy]

Thank you... Remove the whole piece of plasterboard or the pain of it

Would probably be quicker and easier to remove the plasterboard

 

[Graham71]

Thanks both.. Had hoped to avoid that but I guess there isn't another way??

What were your thoughts on the tubbed grout?

 

[Time's Ran Out]

Tubbed grout!!!
Will take months to harden and will shrink!

 

[Dumbo]

Tubbed grout!!!
Will take months to harden and will shrink!

Surely be a nightmare to clean up also as you would probably wipe it out of the joints

 

[Boggs]

Never used it, and not sure I would want to.

 

[Graham71]

To be honest used tubbed on the floor (maybe a mistake) but seems rock hard ?

 

[Boggs]

Mapei Flexcolour is fine on floors, just not suitable for wet rooms and swimming pools.

 

[Graham71]

Yeah it's not a wet room as such... Putting in a shower tray over the tiles and sealing (and have selead between floor and wall and aquapanel joints too) so hoping it will be OK... So take the tub back and buy powdered ?