ᐅ Applying tile or plaster on a skim-coated wall

I completely renovated and skim-coated a room. Afterwards, I decided I want to install tiles and apply a lime-cement plaster on the upper part of the wall. Because of the skim-coating, the wall surface is now very smooth. Will the plaster and tiles adhere properly, or do I need to sand it down or just roughen the surface? Thanks, regards

Tile adhesive also bonds well to a plastered wall. However, you should at least apply a primer to the substrate. Get advice where you buy your tiles. But using a cement-lime mortar on a gypsum substrate is not recommended. It will probably become too hard. There are also thin-layer plasters that can be applied to gypsum. However, I would suggest staying with the same material or removing the gypsum.

beckl1988 schrieb:

and apply a lime-cement plaster in the upper area

I’m wondering why you want to do that? Installing tiles at the bottom is no problem—just prepare the substrate (e.g., primer) and go ahead. For the upper part, I would simply apply a nice finish.