ᐅ Which Plaster – Indoor Climate and Surface Quality?

Hello,

The plasterer will be coming in the next few days, and the more I read about it, the more confused I get. May I ask about your personal experiences, especially regarding indoor air quality and surface texture?

Standard for me is a lime-cement plaster, but gypsum plaster was also offered as a cheaper alternative. Now I have read about lime, lime-gypsum, gypsum-lime, or something similar. I’m feeling a bit lost.

Thank you very much.

In wet rooms, use lime-cement plaster, for example in bathrooms. Otherwise, gypsum plaster is sufficient for interior walls. Gypsum plaster provides a smoother surface, which is better for painters later. Lime-cement plaster handles moisture better, since bathrooms tend to get damp.

I am just starting to look into plastering. In general, so far I would use cement-lime plaster in the bathroom, toilet, and garage, and lime plaster in the other living areas.
What surface finishes are possible with these two types of plaster? Since we will be doing the filling and painting ourselves, what surface quality of the plaster is recommended? As far as I understand, Q3 finish on lime plaster should be suitable for filling and painting—is that correct? Or is Q2 finish sufficient?

You will usually get Q2 level finish; construction crews typically don’t achieve more than that. Achieving Q3 finish is the painter’s responsibility.

Q2 is sufficient for textured wallpaper such as woodchip wallpaper, but not for plain paint.

If you prefer a slightly textured wall, you can proceed as follows:
Fill large dents, joints, and voids in the plaster. Apply StoSil Struktur. While the StoSil is still wet, a second person uses a ceiling brush to create a large sweeping crescent pattern.

Allow to dry. Then paint with your chosen emulsion paint.

This finish looks similar to woodchip wallpaper, visually evens out imperfections well, and saves on labor costs. It can be done as a DIY project. Karsten

Thank you for your reply.
With lime plaster or lime-cement plaster systems, is there a base coat and a top coat, or is the plaster applied directly in a single layer onto the wall (in my case, hollow brick)?

Ytong was sprayed on with a machine and then smoothed out. Lime-gypsum plaster mixture.
In the bathroom, lime-cement plaster was applied in the traditional way using a trowel. The areas there are quite small anyway. Karsten