I have plastered painted basement walls that need to be fixed, including in a future bathroom. I was set on replastering them but heard about cement-based filler, and since it feels significantly safer and easier to apply filler than plaster, I'm wondering the following.

1. Does such filler breathe as well as plaster?
2. Can you tile over it?
3. Is it sandable without a concrete grinder or similar?
4. Does silicate paint adhere to it?
5. Any brand that someone can recommend?
 
I would probably say yes to all the questions, and Finja 360 on the last one.

But the question is how easy it will be to work with, you'll have to mix a little bit at a time, otherwise it sets in the bucket for you. The filler does have a nice plastic consistency and sticks well. However, you won't get the same surface as if you were plastering. It's easiest to sand or scrape off the excess when it's semi-hard, then it might require a bit more work.

What kind of substrate do you have under this?
 
I just polished up a 9m wall with plaster and concrete mix b. That wall was leaning 6cm, satisfied with the outcome of that. Pictures will come in my project thread later under bathroom.
 
The surface is hard; it is some form of cement mortar, not lime mortar or similar. On this sits a paint from 1958, which I plan to open up as much as possible. It doesn't matter much if it's open since the exterior walls are insulated with isodrän, but I still want it to be as permeable as possible. Moreover, what I apply must of course adhere. There are also salt-like deposits in some areas, as the walls were previously covered.

It seems extremely difficult to plaster a wall when I've never done it before, not that it's easy to skim coat even with sand putty, but still.
If you use, for example, Finja putty and get it even, will it leave a smooth surface or will there be small pores visible when paint is applied?
 
I recently plastered walls with Finja 360 and can really recommend it!
As mentioned, mix a little at a time because it sets quite quickly.
Once you've plastered and let it dry, sand it with coarse sandpaper, and the surface will turn out great!
We are very pleased with the result ourselves!
 
Okay, that sounds good.
Did you paint the walls afterwards? What kind of base did you have?
 
Jopp! :)
I have bought Fluggers Silicone Paint which is diffusion-open. It will be used on unpainted surfaces.
And before I paint, it needs to be primed first...
Unfortunately, I haven't painted yet because I'm in the process of tearing out the sauna, and will therefore tear down a wall in that room.
You always come up with something more during an ongoing project. :/
It feels a bit silly to paint when I have to tear down an interior wall and fiddle with such things.....
The substrate is Puts&Murbruk B/C (can't remember which), which I plastered with, the result was not good, so I filled the walls afterwards.
 
Sorry for hijacking a bit here; if you have shabby lime plaster in the basement (house from '29, lime-plastered brick, but a bit unsure about the basement if it really is lime plaster there). Planning to knock it down and lime plaster again. But could this be an alternative even if the substrate in some places would be lime plaster?

/A
 
No, I think that lime plaster is too weak for cement-based wall putty.
 
Click here to reply
Vi vill skicka notiser för ämnen du bevakar och händelser som berör dig.