Aerated concrete or sand-lime brick with external thermal insulation composite system (ETICS) made of polystyrene

  • Erstellt am 2019-04-26 20:15:43

guckuck2

2019-04-28 06:59:03
  • #1
Or in the plaster, if it is not to be painted.

Mineral wool has the advantage of a more ecological image. In a multi-family house, you need (at least) fire barriers because EPS is indeed flammable and drips down like napalm. In a single-family house, irrelevant.
Mineral wool adds mass to the facade compared to EPS. This additionally provides soundproofing. The algae theorists say mineral wool stores thermal energy and does not cool down as quickly on the surface, i.e., the cause of algae on EPS (surface dries more slowly, temperature drops quickly) is reduced.
My last ETICS facade cost a total of €23,000. With EPS 16cm WLG 032 in the Brillux system. Without paint but plaster in “Protect”, so with additives. The house is about 200 sqm (flat roof also with parapet). Mineral wool surcharge would have been about €6,000. Besides more expensive material, there is also the work of doweling. Mineral wool must not get wet; that is its greatest potential for damage. Both during processing and afterwards (also with brick cladding).
Unlike EPS, mineral wool boards cannot be sanded. The risk of seeing the joints of the boards afterwards is higher. As far as I know, they are not available with a step joint either.

All in all: It can be done, but it comes at a price and is not beyond any doubt. Even if the next serious chemical disaster is discovered in EPS, in my opinion, the surcharge for mineral wool is not worth it. I have a neighbor who builds with filled Poroton, very atypical here, and accepts tens of thousands of euros extra for it. Precisely because EPS has a partly bad reputation. But for the extra cost, he could build the whole facade at least twice or have it repainted regularly for the next 50 years. Oh well.
 

Wugler1978

2019-05-08 15:33:47
  • #2
I hereby report completion!!!

We have switched again from Ytong to KS+WDVS and saved 11k€. We can now spend that on other things, e.g. a higher basement.
 

Tego12

2019-05-08 15:34:48
  • #3
With the price difference, always the right decision!
 

CoolCat

2019-05-08 15:48:58
  • #4
How is your construction there, 17.5 KS, 20cm ETICS and 2.5cm mesh and plaster?
 

Wugler1978

2019-05-08 15:58:51
  • #5
Exactly
 

CoolCat

2019-05-08 16:35:19
  • #6
It will probably be the same with us.

Provider 1 40cm Ytong and Provider 2 the same KS combination.

We are currently leaning towards Provider two and are still waiting for the offer.
 

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