Single-layer masonry vs. double-layer masonry with ETICS

...I don’t mean the basement exterior wall

I thought the construction was from outside to inside: perimeter insulation, concrete, sand-lime brick. But then do you still need sand-lime brick on the inside? How thick does that become? If you only have 6m for a semi-detached house, you get annoyed about every lost cm.

Hello,
Rather 10 cm, however, you are also adding 10 cm ETICS in front of the masonry and the prospect – if the tightening of the Energy Saving Ordinance continues like this in the coming years – of having to dispose of this system as hazardous waste is expensive before you can take further energy-saving measures. If you choose the 36.5 cm aerated concrete, these possible costs do not arise, as you can apply additional insulation materials without further demolition measures.

Is it being discussed that ETICS will soon be banned and treated like asbestos?
It’s about a semi-detached house with a width of 6 m. You have to leave 3 m space to the neighbor. I would have it built so that I fully use the max width. How am I supposed to add an additional insulation layer later if I have the 36.5 cm aerated concrete? Or do you generally leave 10 cm safety space to be able to upgrade later?
I don’t want to have to do anything with the insulation for the next 25 years. Ideally, even longer.

Excerpt from a - in my opinion - good article from FAZnet dated 16.11.2010:

"There is no topic currently causing more excitement than thermal insulation for buildings...
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The hysteria of sealing off

The Germans have oddly and carelessly abandoned the solidity of their buildings. At the same time, and this is an almost perverse dialectic, the tendency towards armor-like encasement escalates to the pathological. Every child is sternly told that if it puts a plastic bag over its head, it will no longer get air and will die. The same basically applies to houses. Let nothing in and nothing out, sealing off, bell-jar ideology: The full thermal insulation also reflects the collective psychogram of a society that has panic fears of intruders and infections. However, this very hysterical sealing against everything coming from outside collides with another core German primal fear: that of mold.

This is the paradox of German insulation already visible on a massive scale today: fungi form inside because moisture cannot get out, outside the woodpecker pecks through the insulation boards and builds a nest in the Styrofoam. The German insulation fury, however, cannot be stopped by these contradictions, not least because its character is that of a messianic mission: The world climate shall recover through German insulation material.

The cloak of an economic advantage

The components of the house sealed with thermal insulation composite systems are no less un-ecological: To protect the climate, entire oil fields are transformed with gigantic effort into polystyrene rigid foam, polystyrene extruder foam or polyurethane rigid foam; it is plastic that, behind the plaster, is supposed to ensure ecological correctness as an insulating material. The full thermal insulation, which aims to protect the climate, is thus already in production part of the global energy problem it is meant to solve – which is stubbornly ignored, behind which lie other, purely commercial interests.

It is worthwhile, in the debate about full thermal insulation, to also take a look at the interests of the so-called crafts trades. Building a classic, double-shell, climate- and breathable brick wall costs time and money. For the general contractor, the profit margins on a building constructed using thermal insulation composite system technology are vastly higher: Whoever has once seen at what speed a handful of masons build a wall with suitcase-sized industrial bricks; at what rapid pace insulation boards are then either dowelled or often also glued (exactly: glued, greetings to the climate protectors) onto this wall, before a bunch of desolate plasterers armed with a spray gun slaps reinforcing mortar and finishing plaster on in just a few hours: Whoever sees that a whole house is built five times faster in this way, but that the house still costs almost as much as a classic brick building, will also understand why almost only this way is built: The ecological aspect only serves to cloak an economic advantage.

In ten years, everything will come down

The most visible success of full thermal insulation of houses is the fact that the head plasterer rolls onto the site in the latest Porsche Cayenne for the damage inspection when the whole mess becomes soaked or falls off after a short time; full thermal insulation mainly helps the wallets of construction companies.

“Sustainable,” the second important word without which nothing can be built today, it certainly is not: Because unlike vacuum-sealed cheese, the plastic-coated house is not known for great durability. With great certainty, the entire world of new buildings will be a house-shaped special waste landfill in ten years: The polystyrene boards swell, condensation forms between the insulation and the exterior plaster, which cannot completely evaporate due to the high water vapor diffusion resistance of the exterior plaster and paint. The plaster cracks, the insulation slowly gets damp, loses its insulating effect, and in ten years everything will come down, often by itself. Facades were until recently among the few things one could not and did not have to throw away; full thermal insulation changes that...."

Kind regards

Hello,

I thought the construction was from the outside in: perimeter insulation, concrete, sand-lime brick.
But then do you still need sand-lime brick on the inside? How thick does that become? If you only have 6m for a semi-detached house, every lost cm is annoying.

No, I didn't mean the basement at all. I meant the exterior walls of the ground floor and attic. Why do you only consider aerated concrete and Poroton as options? If you value sound insulation and thermal mass, then sand-lime brick would actually be a very good alternative.

However, it is important that the overall concept is right. There is no the optimal exterior wall that is the best choice for every house.

Regards

Now I would be really interested to know whether the ETICS "non-believers" (construction experts especially dislike EPS and other "plastic insulations," or whether mineral insulation materials (Multipor, for example) are also considered "bad"....

Regards, bxka

The article speaks to my soul.