What mortar should I use on interior basement wall

[mili1983]

Hello everyone!

As the title suggests, I'm wondering what kind of render I should/can use on my uneven basement walls internally? It's time to tackle this former pantry and clothing storage. As shown in the pictures, it's very uneven in places. I think it's lime paint today. I'm wondering now if I should install a render mesh and render with render mortar c then paint with silicate paint or skip the mesh entirely? Alternatively, skip the mesh and render mortar c and only render with tile adhesive since that material breathes, right? Or are there other options?

 

[mili1983]

Could this possibly work to then paint with silicate paint? https://www.bauhaus.se/rotband-handgipsputs-20-kg

 

[Stefan N]

I have a notion that it's not ideal to use silicate on gypsum, but it's possible if you have primer.

 

[mili1983]

I have a feeling that it's not ideal to use silicate on plaster, but it works if you have primer.

Oh, due to adhesion ability. According to the data sheet, the substrate to be plastered should be primed, but I didn't know that it should also be primed before painting. Do you have other suitable materials that can be used for this purpose and that are breathable?

 

[Stefan N]

Start by finding out what color you have today, it will somewhat determine what you can continue with.

 

[mili1983]

Start by finding out what color you have today, it somewhat determines what you can continue with.

I'm pretty sure it's kalkfärg.

 

[Stefan N]

In the top picture, it looks very glossy for being kalkfärg.

 

[mili1983]

In the top picture, it looks very glossy for lime paint.

Do you think it might be regular plastic paint? Since it hasn't come off anywhere and I imagine it's been there for a long time, having lived here for 10 years, I think it might be lime. I remember testing it before and got indications that it was lime.

 

[mili1983]

do you think it could be regular plastic paint? Since it hasn't come off anywhere, I can imagine it's been there for a long time, I've lived here for 10 years myself, so I think it's lime. I seem to have tested it previously and got indications that it was lime

in what way do you mean it affects before I continue?

 

[Stefan N]

If it is plastic paint, you need to sand it off before continuing with plaster.

 

[mili1983]

If it's plastic paint, you need to sand it off before continuing with plaster.

Really hope it doesn't turn out to be plastic paint. I should probably chip off a piece and take it to the hardware store for testing.

 

[mili1983]

It is apparently supposed to be silicate paint according to the building supply store that tested a piece of the paint.

 

[mili1983]

Should I be able to plaster with Knauf Rotband on silicate paint as follows: existing silicate paint->primer->Knauf Rotband->primer->silicate paint or can I skip using primer on Knauf Rotband before silicate paint?