ᐅ Facade Paint: Silicate or Silicone Resin?

I know, I know... this topic has been discussed many times... All solutions have their pros and cons and depend on the specific building...
Precisely for this reason, I'm asking for help. Maybe there are some master painters here who could provide me with independent advice.

New build, gable roof (42°) WITHOUT eaves. The house borders directly on fields, orchards, and vineyards...
The planned façade is light (not white) with a fine broom finish plaster, and light brick slips will be applied to the garage.
Wall construction: filled (with mineral wool) Poroton bricks, pure lime interior plaster, silicate paint (Innostar by Keim).

It is important to me that the wall remains as vapor-permeable as possible, that no algae or mold develop, and that dirt washed off the roof does not leave streaks on the wall.

Next week, the Brillux representative will visit us. Since he naturally cannot be entirely objective, I would like to read your opinions on the topic of “silicate vs. silicone resin paint.” Brillux, Sto, Keim, Caparol? Maybe another manufacturer?
Which paint have you used?

Thanks in advance for your comments.

Kati2022 schrieb:

It is important to me that the wall remains as vapor-permeable as possible, that no algae or mold develop, and that dirt from the roof does not leave streaks on the wall.

No matter what you use, nothing will fully meet your requirements 100%.

Kati2022 schrieb:

Next week, the Brillux representative will come to see us. Since they obviously can’t be completely objective, I would like to read your opinions on the topic “silicate paint or silicone resin paint.” Brillux, Sto, Keim, Caparol? Maybe another manufacturer?

That first depends on the plaster you use. What kind of exterior plaster are you planning? If it is mineral-based, then a mineral paint (silicate) would be suitable. The manufacturer doesn’t really matter.

nordanney schrieb:

What type of exterior plaster are you planning? If mineral-based, then also a mineral-based paint (silicate).

Yes, mineral-based.
Is there another good alternative for my interior wall construction?

I’m just wondering which paint will keep the facade cleaner for longer.
As already mentioned – no roof overhang.

Kati2022 schrieb:

Yes, mineral-based.
Is there any other good alternative for my interior wall construction?

There are plenty of alternatives. And, of course, it’s also a matter of personal preference.
From gypsum plaster to clay plaster or lime-cement plaster. They all work equally well – each has small advantages and disadvantages.
The term “vapor-permeable” is a buzzword in new builds but doesn’t really have much significance.

Kati2022 schrieb:

I’m just wondering which paint keeps the facade cleaner for longer.

No real differences. It’s a matter of opinion whether you prefer a (temporary) lotus effect or classic silicate paint with the appropriate pH value.

The substrate is more important than the topcoat.

Which base coat should be used?
Which primer?
Should the plaster be mixed on-site from dry material in bags and then painted?
Or should a pre-colored mix in buckets be used?

What grain size is preferred?

If you use only a fine grain, around 2mm (0.08 inches), and eventually need to repaint, it will mostly disappear.
I believe you need to repaint your house every 10 to 15 years. Strong colors tend to fade on the sunny sides as well.
This looks very unattractive and often starts within just a few years.