36 cm Ytong exterior wall, solid construction, mold formation, insulation

  • Erstellt am 2012-09-13 08:29:06

€uro

2012-10-17 11:09:04
  • #1
There cannot be one either, unless the person answering has clairvoyant abilities
An energy consultant from the insulation industry will always answer this question unreservedly with YES. However, the actual conditions are far more complicated.
Theoretically, additional insulation reduces demand, the extent of which depends on the initial situation. Building physics aspects also play a role (the vapor permeability of the external finish (plaster)). If condensation occurs, the theoretical insulating effect exists only on paper. The same applies to the heating system. With a brine heat pump as the heat generator, the measure will probably have only marginal success. With a heat generator based on the combustion principle, e.g., oil or gas, theoretically more so. However, if the heat generator was already oversized, additional insulation can possibly lead to a deterioration of the annual efficiency of the system. The theoretically intended saving effect is practically only partially effective, so one has to ask whether the actual result was really worth all the effort? With additional insulation, adjustments to the heating system are often required.

You probably won’t get the truly valuable "non-plus-ultra solution" for free in three words

best regards
 

solu15

2012-10-17 14:18:00
  • #2
Thank you €uro, that is at least an answer that I can understand
 

Wegener SV

2012-10-20 11:53:37
  • #3
just quickly calculated, the exterior wall - with the best currently available Ytong Planblock - has a U-value of 0.21 W/m²K I have nothing to do with the company Ytong
 

kamnik

2012-10-28 11:12:24
  • #4



I would change the BU. Anyone who recommends a 36 cm Ytong as an exterior wall is rather suspicious.
A Ytong soaks up water like a sponge. Building damage is programmed.

Better: use 36 cm brick. With normal plaster (inside/outside) there is no mold formation; unless you ventilate too little. It has proven itself; otherwise, all the old builders would be idiots and half of Germany would be moldy?
 

Bauexperte

2012-10-28 11:24:31
  • #5

This rumor, also sold as an unshakable fact, is persistent
Have you ever placed a piece of aerated concrete in water for several hours? If not, you should do so; a surprise awaits you.

Kind regards
 

E.Curb

2012-10-28 13:40:28
  • #6
Hello, kamnik, the statements you make here in the forum are sheer madness. I am amused. Surely every planner (do you actually come from the construction industry?) has their favorite. I also do not prefer aerated concrete blocks, but to say categorically that it is rubbish and building damage is inevitable is an even bigger nonsense. And to claim that bricks, just because they have often been used in history, are the be-all and end-all is also not exactly a sign of professional competence. Aerated concrete as well as bricks can be used without causing building damage. The choice of the right building material requires further knowledge of building technology....... Regards
 

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