New building exterior facade clinker/plaster

Hello, we are currently in the planning phase for the new construction of a single-family house in Owl. Now inevitably the question arises whether the exterior facade should be plastered, i.e. single-layer with ETICS or double-layer with Dutch clinker brick cladding. The goal is a KfW 70 standard. We had actually already decided that it should be clinker because it "breathes" much better and I have not been particularly enthusiastic about the sealed plaster facades so far, also with regard to maintenance. However, a builder recently told me that there are plaster facades that last 30 years with the first coat of paint. And in combination with a LW heat pump and integrated ventilation system, this would certainly be justifiable. Especially since the costs for a plaster facade are 10,000 - 15,000€ below the clinker facade. So my question: which construction of ETICS systems is the most durable, and now I don’t only mean the insulation material but also the plaster and the paint. That also plays a big role. Thank you in advance for your answers....

. Actually, it was already decided for us that it should be clinker bricks because they "breathe" significantly better and I was not particularly impressed with the sealed plaster facades so far, which also applies to maintenance.

Since when do stones breathe?

Hello,

Actually, it was already decided for us that it should be clinker because it "breathes" significantly better.

Interesting statement

But a builder told me that there are plaster facades that last 30 years with the first coat.

These statements have been around for a long time; however, I don't consider them really reliable. However, you can increase the durability with a fungicide-algicide coat; these coatings are also available on an ecological basis. When calculating the cost-benefit ratio, you should always compare the costs of cladding with the expected repainting interval of a plaster building; the technique has no place in this comparison.

We have found that the degree of soiling / cleaning options depend significantly on the positioning of the house on the plot as well as the number of floors. Example: if the weather side is facing north, the garage is placed at this spot and it is a classic single-story building, usually a regular treatment of the north facade with a high-pressure cleaner is sufficient. Easy to handle for private individuals and also easy to manage for people with two left hands.

It looks different if the building to be erected – which I don't really see for OWL – is located in the catchment area of coal or industry. In these cases, however, a cladding stone doesn't really help you; it only “pretends” a “clean” facade. Because even the clinker absorbs rainwater, then dries off and retains the dirt in the clinker. That is why especially white cladding facades often look “dirty” after a short time.

Rhineland regards

Well, by breathing I mean that a two-shell construction in combination with clinker is more diffusion-open and moisture can be better transported away. How about the insulation material; are there differences in terms of durability? Is only the coating that decisive?

You can ignore the moisture diffusion of the walls. Not even 1% of the moisture generated inside the house diffuses out through the walls. Whether with clinker 0.3% or with ETICS only 0.2% goes through the walls is six of one, half a dozen of the other. The moisture leaves the house only through drainage and ventilation!

What else comes to mind is a bicycle that falls over awkwardly and can thus punch a hole in the cleaning cover. Which would probably be completely impossible with clinker.