We want to build, is what is being offered to us okay?

Dear construction expert,

that would then mean that cellular concrete blocks can be used without concern in the armpits. I am thrilled, as I have always tried to avoid this until now due to concerns regarding aluminum.

Sorry, I will pay attention to it in the future - I thought it was absurd enough, but you are right.

Freely according to Uncle Wiki: "For insulation in new buildings, solid materials such as polyurethane rigid foam (PUR/PIR), stone or mineral wool, extruded polystyrene rigid foam (XPS), expanded polystyrene rigid foam (EPS), or loose fill can be used. For retrofitted cavity insulation, polyurethane in-situ foam, stone or glass wool, expanded polystyrene granulate (EPS), silicate lightweight foam granulate (SLS20), expanded perlite, and aerogel are suitable. The insulating materials must be permanently water-repellent (hydrophobic) and comply with the standardized application of DIN 4108-10 (WZ = insulation of double-shell walls, cavity insulation)."
This would mean for me in reverse: Insulating materials that do not have this approval require ventilation (I suppose so).

What is correct now? Is air between insulation and masonry according to DIN? Or is it only required depending on which insulation material is used?

According to DIN 1053, an air layer at least 4 cm thick must be maintained. Rheinische greetings

Does that mean that cavity insulation contradicts the DIN? Or is the topic of cavity insulation not simultaneously applicable with the DIN?

Does that mean that cavity insulation contradicts the DIN standard? Or is the topic of cavity insulation not simultaneously applicable with the DIN?

Some suppliers/architects believe that they can omit the air layer with cavity insulation because there is an approval for this from the Institute for Construction Technology; I seem to recall, however, that this only applies when using mineral wool. On the other hand, this execution contradicts the recognized rules of technology and thus again the DIN. Rhineland regards