ᐅ Aerated concrete or calcium silicate masonry with external wall insulation system (EWIS) using polystyrene foam

Where should the advantage come from? It is attached to the outside of the wall. Therefore, it has nothing, absolutely nothing to do with what is inside, at least regarding the indoor climate... both only ensure that the energy entering the house stays inside.

However, for a healthy indoor climate, humidity is primarily responsible. There is no diffusion (neither in nor out) of moisture through the external thermal insulation composite system (ETICS), regardless of the material it is made of.

Tego12 schrieb:

Do you really believe that “Nimm 2” is full of good vitamins, or that Kinder chocolate is healthy because of the extra milk? At least that’s what the advertising says.

How is mineral wool supposed to change the indoor climate? There is no direct contact with the interior, nor does it affect air exchange.

Durability... no idea, but EPS will outlast you... Even if mineral wool lasts 200 years instead of 100 years... (I have no idea...) What’s the advantage?

I agree with you about the indoor climate. The interior plaster is what really matters. We chose lime plaster here.
I am concerned about pesticides in polystyrene insulation (whether justified or not is another matter; also whether mineral wool or other insulation materials are actually better than polystyrene). People always say it’s no problem, but the same was claimed about asbestos for many years.

Sorry, I didn’t mean to sound accusatory. It’s a valid and important point—especially in the field of insulation, where there are many conspiracy theories claiming that insulating doesn’t make sense and that polystyrene is the root of all problems.

Pesticides: in polystyrene?? You probably mean in the exterior paint layer, right? Whether you use paint containing pesticides or not… that has nothing to do with the choice of insulation material. The belief that ETICS (external thermal insulation composite systems) facades are more prone to algae is widespread, but take a look at the Fraunhofer study… ETICS facades on average do not suffer more damage than facades without ETICS.

If EPS turns out to be toxic… (your asbestos example)… as I mentioned above, you’re better off worrying about the countless everyday situations where you have direct contact with it.

Tego12 schrieb:



Pesticides: in polystyrene??

I mean chemicals against mold, algae, etc.

The reference is to HBCD in EPS.

In rockwool, phenol-formaldehyde resin is used as a binder, whether that is better or not.

Hbcd is a fire protection agent and is no longer included in current EPS.

The chemicals against algae, etc., are not in the insulation material but, if at all, in the exterior paint on the render.