Exterior plaster directly with leveling coat?

Hello everyone,

the exterior plaster on our house needs to be done. Our plasterer has offered to apply an equalizing coat on the top coat (mineral in country house style).
Does anyone have experience with this? He said that this coat protects against algae growth, makes the plaster really white at first. And that then the painter's final coat wouldn't be necessary.
My painter is not very familiar with the equalizing coat (he was honest about that) and said that it probably doesn't last that long and then a final coat would be necessary.

Does anyone have experience with this?
Do I need the equalizing coat, and is it an alternative to the final coat? After all, the equalizing coat costs about 2,000€. The painter's final coat would probably cost a bit more (especially because he would have to set up his scaffolding again).

Best regards, Crimson

Hello,

a small question for understanding: How is the leveling coat of your plasterer supposed to differ from an "ordinary" coat of paint by a painter?

It is simply the first coat, the type of application you can arrange with both your plasterer and the painter (e.g. silicone resin, etc.).

At least that is the case with us and all other builders in our area.

I also wonder what the difference is... the painter's coating would be an algae-resistant coating in pure white (silicate-based?,...). The equalization coat is also algae-resistant in white. To me, both sound relatively similar, if not even the same.

For me, the only question is: Is there a difference between the coating with facade paint from the painter or the equalization coat from the plasterer? Do both last equally long (15 years or longer)? Or does the equalization coat wear off after 5 years and you have to have the painter repaint with facade paint?

If I’m not mistaken, the painter lets the finished plaster rest for a while so that the chemical processes can complete before painting. And then possibly paint twice?

The equalization coat would be applied directly after plastering.

There are also plaster systems with algae/fungus-inhibiting additives. For this reason alone, the coating is not necessary.

Thank you for the reply. Unfortunately, my question is not resolved by that^^. I think it can be reduced to the following: Does a primer coat (or leveling paint) last as long as a coat with dispersion or silicate paint with the same coverage? And are these two types of paint actually comparable?

So, in case others also come across the topic: No, it is not a substitute for a facade painting