Ventilated façade: advantages/disadvantages? Pest problems?

As wrote, forget "breathing walls" – they do not exist. Ventilated facades are the standard solution but also (significantly) more expensive. The openings are usually closed with insect screens. The facade can also be additionally insulated. For cost reasons, this construction method is rarely used for single-family houses.

That's why I put the diffusion-open facade in quotation marks, I thought so already.

How about durability/weather protection? It should help somewhat with moisture that air can circulate there, and also for heat protection (as far as that even plays a role in walls) the air layer should be beneficial, right?

There are also small insects, or something against bees/wasps/etc., and sealing out rodents is extremely difficult to impossible. Is that a known problem with these facades or should we not worry about it?

So basically there are no major advantages for us with this facade? Since we are plastering, the design flexibility is not a big argument, at least not right now. When we talk about significantly more expensive, are we talking about €5,000, €10,000, or €20,000 for a single-family house of about 140 sqm?

A flat rate for the additional cost cannot be specified as it also depends on the size, type of fastening, materials, etc. But 20k is rather realistic, with no upper limit. The additional air layer provides a significant improvement in heat protection but also the other way around. The materials underneath are of course better protected as well. In my lifetime, this does not play a role with our waterproof concrete. Everything up to bee size can be kept out with insect screens. Smaller than that becomes difficult, but it does not cause any problems.

The additional cost cannot be specified flatly as it also depends on the size, type of fastening, materials, etc. But the 20k is rather realistic; upwards there is no limit. The extra air layer adds quite a bit in terms of heat protection but also vice versa. The materials underneath are of course better protected as well. In my lifetime, this does not matter for our WU concrete. Everything up to bee size can be stopped with insect screens. Only smaller gets tricky. But it is not a problem.

Sorry for the late reply, I was quite stressed. As far as I can tell, it is a fairly simple construction: wood fiber insulation boards, on top of that a beam construction as a 40mm ventilation layer, and then the wood or plaster facade. What I like about this is that we can combine plaster and wood as we please without extra charge. Compared to our second favorite, it is about the facade, wood-aluminum windows, aluminum roller shutters (alternatively blinds at no extra cost), fall protection made of safety glass for floor-to-ceiling windows, and free color choice for almost everything for about 30,000€ more. Is that okay or too much?

How is anyone supposed to judge this?

How is anyone supposed to judge this?

Well, the title of the forum is "Experiences of builders and construction experts" and I thought a construction expert might be able to estimate this. The size of the house is 140-150 sqm on two floors, besides the points I mentioned, everything else is relatively comparable. But if no rough assessment is possible, then just say so instead of posting a passive-aggressive comment.

... There are also small insects, or something to keep bees/wasps/etc. or even rodents out is extremely difficult to impossible. Is this a known problem with these facades or should we not worry about it? ...

In two rental apartments that I once lived in, this was a problem in the form of mice. In one apartment, you could hear them, among other places, in the suspended ceiling, and in the other apartment they had even nested in the roller shutter box.