ᐅ Interior Plaster – Which Type Is Recommended?

Hello,

Our shell construction (unfilled T9 brick masonry) is now complete.
Now the question is which interior plaster we should use?
The masons have advised us against gypsum plaster, especially since our masonry is still quite damp and the plastering is planned for January.

We have received an offer for a first layer of lime-cement plaster and a second layer of lime plaster (with a small amount of cement).

No one we have spoken to wants to apply pure lime plaster.

Does this make sense?

Thank you in advance

Melanie

What exactly is supposed to be damp on a T9, and what does gypsum have to do with it?

You should know best yourself what you like, right?

T9 is not related to moisture. I just wanted to point out that the masonry is still very damp. I am asking because I am not sure which type of plaster is best.

A solid brick masonry cannot be damp; that was the point, and it has nothing to do with the plaster.

For example, we like gypsum and smooth walls the most.

Our plasterer told me that he would only use lime-cement plaster in his own home. However, we only use it in the bathrooms; everywhere else we use gypsum plaster. Gypsum plaster can be very smooth (if applied well) and could be painted without wallpaper if desired. I would recommend asking for a price quote for the next higher quality level, and if it fits within the budget, go for that.

The absolute best option for indoor air quality is probably clay plaster.

Another point to consider regarding gypsum plaster:

Gypsum plaster contains gypsum. There are two types of gypsum: one produced as dust from industrial processes (known as “FGD gypsum”) and one from natural deposits.

The older generation often claims that gypsum from industrial plants can be chemically and possibly radiologically contaminated, making it unhealthy. Officially, this was once the case, but modern processing methods have reduced these contaminants so much that they no longer pose health risks.
Natural gypsum, on the other hand, is heavily criticized by environmentalists because its extraction causes significant environmental damage at the mining sites.
Scientific studies show that both types of gypsum are chemically the same.

In the end, I reflected on the choice between ecological concerns versus fear of industry influence and hidden dangers.
I reached no conclusion and let the workers install whatever materials they prefer to use.

In the end, I thought: ecology versus fear of lobbying and covering up dangers. I didn’t reach any conclusion and let the workers install whatever they wanted to use.[/QUOTE]

We have now come to exactly the same conclusion. Thank you for your thoughts. We are now applying a first layer of lime-cement and a second layer of lime. This is how our plasterer has been doing it for years.