ᐅ How to plaster a wall made of concrete form blocks—any experiences?

Hello everyone,

Last year, I built a wall using formwork blocks. Now it’s time to plaster it. I have never done this before and am hoping to receive plenty of experience, tips, and ideas.

My plan was to first use mortar to even out the “irregularities,” then clean the surface, apply a primer and let it dry well. Next, I want to apply the base coat (scratch coat), let it dry again, smooth it out, then apply the finish coat (top coat), and finally place coping stones on top of the wall.

What do you think of this approach? Do you have any advice on which products would be best for this? I am particularly struggling with choosing the right coping stones and finish coat. Perhaps someone has some ideas or even alternatives for me.

Attached are two pictures of the wall, which is 22 m (72 feet) long and 75 cm (30 inches) high.

Thanks a lot Best regards

Lime-cement plaster. The usual layer thickness is 1cm (0.4 inches), but it can be applied in multiple layers and be thicker. You can use it to even out any irregularities, or do you have specific spots in mind? The wall looks new.
Most likely, a plaster base coat is needed underneath because these are smooth concrete blocks—see the application instructions for the plaster.
The surface finish is then up to you. You can float it or choose any texture you prefer. After that, apply a coat of exterior paint, such as silicate paint.

On my shuttering block wall, I applied a layer of plaster mesh with reinforcing mortar as the first coat, which also serves as the base plaster, about 1 cm (0.4 inches) thick. It already looks quite good with a smooth trowel finish. Eventually, a rough plaster similar to the Munich style will be applied as the topcoat.

Would you prefer the look of plaster or perhaps more like a stone wall (because that is also possible with household materials))

More the appearance of the plaster.
@hstkai: Could you please name a manufacturer for me? Are you satisfied?
@guckuck2: Thank you very much for your tips. I don’t have any specific spots, I just want to achieve a smooth surface. For the coating, I was thinking of using the base paint... and I wanted to prime beforehand. What do you think?
Regards

Manufacturer? It was simply the cheapest bagged reinforcing adhesive from the hardware store. It just needs to be labeled as a bonding bridge for concrete surfaces.

The plaster survived the first winter without any visible damage and is rock solid; I’m very satisfied. Above all, the application is straightforward. Apply the adhesive to the wall with a notched trowel, embed the mesh, then apply the adhesive with a smoothing trowel and smooth it out. There isn’t much that can go wrong, and it results in a fairly even thickness. Let the adhesive set, smooth it out, and enjoy.