ᐅ Which type of smooth plaster is best for interior walls?

Hello,
I want smooth plastered walls inside. My painter says that Rotband or Goldband would be sufficient.
From relatives and colleagues, I keep hearing that you need to use special plasters, which cost around 60-100€ for 20kg.

The plaster will be applied over regular cement plaster.

Regards

Maybe because it is the better plaster and not waste.

@TE: Using gypsum plaster over lime-cement plaster is a bad idea. They are not compatible...

There are special smooth lime-cement plasters designed to be troweled smooth as a finish coat.

We will also use those on some walls – and they don’t cost 60-100 euros per bag.

Sebastian79 schrieb:
Maybe because it’s the better plaster and not waste

@TE: Bad idea to apply gypsum plaster over lime-cement plaster. They are not compatible...

Thanks for the advice
Now I have to replace the plaster on almost 300 sqm (3200 sq ft) of surface area...

I always thought gypsum plaster under lime-cement plaster would be the problem — if the gypsum gets wet, the lime-cement layer on top can detach (for example, if the electrician applies too much filler).

I want to use a cement plaster because I consider it to be a higher-quality and, above all, more durable base.

I will check again with some plastering companies to see if they can provide a smooth cement plaster that can be painted directly.
@Sebastian
Why is gypsum plaster over cement plaster a bad idea?

It can react with the cement plaster, causing bulging or detachment.

We will also partially paint the cement plaster because we like the rough texture combined with wall lights.

We had SM700 pro applied as a finishing coat in the bathroom.

Gypsum plaster on cement will eventually flake off. Maybe not immediately, but I know this from our previous house. Not a good idea.