Interior painting after major renovation silicate wallpaper eco fleece

  • Erstellt am 2023-05-12 16:34:08

Malbaer

2023-05-12 16:34:08
  • #1
Hello, I would need professional advice because I have received different information. The landlord wants the apartment wallpapered and preferably painted with silicate paints, not painted directly. The walls are smoothly plastered and will be handed over ready for wallpapering. Now I assumed that silicate paints cannot be applied to wallpaper indoors or that it doesn’t make sense. Today I received information from a painter that special silicate paint can be applied to eco-fleece. In the hardware store, the information was that it makes no sense if the walls have been pretreated with a primer. So how is it now? I would rather not be sold an expensive option that doesn’t work. In the hardware store, there is an interior paint that says it can be applied on woodchip wallpaper. The main point for me as an asthma sufferer is a paint that causes as little irritation as possible and, if possible, also tends less to mold formation. What would I need to clarify? I thought I would clarify which primer is on the wall. Whether painting directly might be possible after all. The urgent question to the forum would be: does such a smooth fleece wallpaper or eco-fleece really work with silicate paint, or is that nonsense? Thank you very much.
 

KarstenausNRW

2023-05-15 12:13:38
  • #2
I still don't understand the question. The LANDLORD wants what? What do you have to do with it? Do you want to move in or did you renovate (after you lived there) and do you have to give the apartment back? What is meant by silicate paint? Pure silicate or sol-silicate or dispersion silicate? All for different substrates. What kind of plaster? What kind of primer and why? Why desired on fleece? Mold formation should not be an issue in a newly renovated apartment. The paint doesn't matter as long as there is proper ventilation and heating. Basically, mineral paints are mold-inhibiting (silicate without organic additives or lime paint).
 

xMisterDx

2023-05-15 21:01:40
  • #3
Always amazing...
purely mineral paints are not mold-inhibiting. Purely mineral paints cannot mold because mold needs an organic food source.

Dispersion silicate paints are mold-inhibiting because they have an organic content of <5% and are alkaline... pH value around 11.

But the original explanations are way too confusing for me.
Smoothly plastered? Ready for wallpapering? That excludes each other. If smoothly plastered, why wallpaper? If ready for wallpapering, you have to glue woodchip wallpaper because the substrate no longer allows...
Glue wallpaper, with paste... and then paint with silicate paint (dispersion silicate paint)? Complete nonsense.
 

KarstenausNRW

2023-05-16 07:46:47
  • #4
I also find it astonishing what leaves out here.

Unfortunately, mineral paints are "only" mold-inhibiting. The pH value of silicate paint—whether dispersion or pure silicate—is above 11 in both cases, so highly alkaline. Unfortunately, over time the paint on the wall loses some of its alkalinity (particularly with lime paint, which is still considered an alternative), and organic particles also settle. Added to this is constant moisture (which is the biggest problem!), and the wall—mineral plastered and mineral painted—can develop mold.
This is exactly why no manufacturer advertises protection, but only inhibition. And it doesn't matter whether it is dispersion, lime, or pure silicate.

But yes, the effect is really good. Complete mold prevention is unfortunately not given—especially if the plaster underneath is not mineral-based. Because then the alkaline layer is very thin.

An alternative to paint—actually even more effective—is a dry and warm wall. Then the paint ultimately does not matter and the wallet can decide.

Unfortunately, however, the OP only asks a "confused" question, maybe reads the answer once again, and the thread disappears again...
 

Tolentino

2023-05-16 07:53:44
  • #5
I will now take the last question as a starting point. Yes, you can apply a (dispersion) silicate paint on smooth fleece. It does not lose its mold-inhibiting effect. It simply does not bond with the substrate (another advantage of silicate paints on lime-cement plaster), but obviously, your landlord does not want that at all (desire for wallpaper).
 

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