Bad Walls

[WetSaw]

Yes Antonio, I am in Spain. My concern is that I would not be able to get mortar to adhere properly to the bricks with the amount of plaster still remaining on them. A Spanish builder suggested making holes all across the wall so mortar could enter and grip. I may try a test area your way ( also lime is only in huge bags!) If I wasn't going to fix tiles @ 30kg m2 I wouldn't be so concerned.

 

[Italy]

I did not see. which was plaster.
use primer. no mortar. use type (Planitop Mapei / keralevel kerakoll).
secured engagement. as it says bricklayer is also ok. make some hole. not hurt. you could fix. also a steel mains. thin. prior to shaving.

 

[WetSaw]

 

[WetSaw]

I've had Man-flu for the past 4 days so I've not done anything. Will certainly try a test area before ordering the Kerdi board ( over €500!!)