ᐅ Which plaster or render should be used to coat concrete walls?

Hello dear forum community, my house is now approaching the final stage, and I would like to start thinking about which type of plaster to use for my walls.
The house was built using precast concrete elements. These walls have varying surface textures.

Some walls are quite smooth, while others are rough.
Can you give me any advice on which materials are suitable for concrete walls?

I have already read good things about "Knauf Multi Finish." However, I am not sure if it is the right product.

Attached is a photo of the current condition. The walls will be wallpapered with painter’s fleece afterwards.

uti-pepe schrieb:

I have already read good reviews about "Knauf Multi Finish." However, I am not sure if it is the right material.

As mentioned, it is a finishing product (the product is good!!) used for applying filler and fine sanding. It is not suitable for joints between the boards because you would have to go over them too often. I would recommend sealing those first with a gypsum-based plaster (except in bathrooms).

I would recommend asking at a specialist supplier, but there are definitely various concrete fillers available. What is your goal? Should the walls be completely smooth or slightly textured? And have you ever applied filler before?

I filled the joints of the precast concrete ceilings with Multifinish joint compound. It worked perfectly and was the recommendation from my local building materials supplier.

Hello, thank you very much for the responses. Our goal, of course, is to achieve smooth walls. We plan to cover them with painter’s fleece wallpaper afterwards.

We haven’t done any plastering yet, but I have held a trowel before (training as a bricklayer).

Well, you should be able to manage that. The key is to work carefully and precisely. If necessary, you may have to apply putty and sand 3 to 4 times. If a fleece layer is applied afterwards, it can also cover minor imperfections, and paint will be applied later as well. The joints are straightforward; larger continuous surfaces are more challenging. That’s simply a matter of diligence.