How to remove spiky "plaster" on basement wall

[Martin Berg]

Hello, I have a furnished basement with underfloor heating. The walls are plastered and prickly, maybe it's called "rappade"? Anyway, I don't want that prickly surface, I want something smoother instead. I wonder if anyone has any tips on how I can easily fix it?

Can I even it out? It is painted on top, so I guess it won't stick?
Can you remove only the "rapper"? How?
I'm uploading two pictures, a close-up and one of the wall.

 

[1977bjorn]

Skim coating is probably the fastest. I don't think there's sandpaper that will work on that.

A diamond grinding head on an angle grinder is an option, but you would still have to smooth.

Possibly one of these:
https://www.k-rauta.se/produkt/hand...01agDmUuL2RXIb1Sv6E15-2Mt7rLZsDsaAjiREALw_wcB
but.... LOTS of work. Easier to smooth from the beginning.

 

[Trrttsch]

There was an article about it in the latest Gör Det Själv. First, you need to sand down the peaks, either with a hand sanding stone or a cup wheel for the angle grinder. Then apply a thin coat with, for example, gypsum plaster. A lot of work as mentioned.

 

[sofftis]

There was an article about it in the latest Gör Det Själv. First, you need to sand down the peaks, either with a hand sanding block or a grinding cup for the angle grinder. Then apply a wide layer of filler with, for example, plaster. A lot of work as mentioned.

Is it really necessary to sand? I would have just filled it, if it's dry, that is.

 

[Trrttsch]

Is it really necessary to sand, I would just have applied filler, if it's dry that is.

It's probably difficult to get the filler to stick if it's painted.

 

[sofftis]

It is probably difficult to get the filler to stick if it is painted.

I would have tried, as jagged as it is. It will probably be difficult to remove that paint?

 

[ati]

I would have tried, as prickly as it is. It might be hard to remove that color?

Maybe you can use a primer first if the color would be a problem? Can you test it so I don't have to? I have a heart wall that's too prickly for my taste

 

[Martin Berg]

Maybe you could use a primer first if the paint might be a problem? Can you test it so I don't have to? I have a feature wall that's too rugged for my taste

Hello everyone, I've made some progress on my job..... the solution that works for me is a shop vacuum connected to an angle grinder with a guard so that I don't get the battle of Lützen throughout the room (dust), and with a diamond grinding head.

I first bought a lousy blade from Jula but it didn't work at all, so I stepped up to Biltema and that might have worked if it hadn't been too low to reach when I had the guard on the angle grinder. Finally, I found a decent one at Beijer bygg. Now I've done about two-thirds, just working a little now and then when I have time. Effective time after getting all the stuff might be 15 hours or so, including a lot of vacuuming on the floor, as not everything goes into the vacuum. I've also gone through about 12 vacuum bags.

Here are some pictures of how it looks on a wall that also seems to be peppered with old holes. And a wall where there's a brick wall behind the paint.

I think it looks good, I want that rough look, so I'm aiming to paint with lime paint in a few layers.