Insulate new construction 36.5 aerated concrete?

  • Erstellt am 2014-01-17 14:00:38

bygoran

2014-01-17 14:00:38
  • #1
Hello

our new building starts on Monday.

I am considering whether to insulate the 36.5 cm aerated concrete wall right away while the scaffolding is still there.

we are building without [KfW] but want to insulate as well as possible.

according to the U-value calculator I need to use 200mm insulation to avoid moisture problems. Is that correct?

can someone tell me more about this? Or calculate exactly how thick the insulation needs to be to avoid problems.

Controlled residential ventilation with heat recovery is also planned.

the last ceiling under the cold roof is made of 24cm concrete, there I plan to lay 240mm mineral wool (035). Is that sufficient?

I would be grateful for any information
 

kaho674

2014-01-17 15:36:14
  • #2
That's crazy,
we build 36.5 cm walls without insulation and achieve Kfw 70. Of course, this also depends on other factors, but I think it's really good for us.
 

E.Curb

2014-01-17 16:15:59
  • #3
Hi, how much insulation makes sense, or not, should be told to you by your planner. No one here will be able to do that.

Regards
 

Wastl

2014-01-17 16:24:08
  • #4
The new construction starts on Monday and you are now wondering if you need insulation
200mm is 20cm - and all around? Does your building permit allow that?
I can’t say anything about the values; to me as a layperson it sounds very strange. Something like that was discussed a long time in advance with us. Only when all the parameters were fixed (building structure, insulation, U-values, etc.) was the building application submitted and only then did we start building.
 

Explosiv

2014-02-10 17:45:34
  • #5
Hi
we also build with aerated concrete 36.5 cm without additional insulation. That is the advantage, that you don’t have to put a soft insulation around the house, which then needs extra protection and to which nothing can be properly attached.
Of course, you can still plan a facing wall in brick or sand-lime stone, but at some point the budget runs out. And what happens over time between the two walls is only known by the insects, mice, and rats.
With our aerated concrete, we achieve KfW 70, which is enough for us for now. You can still insulate our bungalow later if needed, but I do not intend to.
 

DerBjoern

2014-02-11 09:18:48
  • #6
36.5 porous concrete and KFW70? Let me guess, air heat pump with solar support?
 

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