ᐅ Exterior insulation system (ETICS) on 24 cm Poroton brick or alternatives?
Created on: 25 Feb 2013 12:18
E
einstratege
Hello,
we are currently building a KfW70 house with about 180 m² (1,937 sq ft).
The exterior walls are made of 24 cm (9.5 inches) Poroton masonry, heating is gas plus solar for hot water.
There is no ventilation system.
The planned exterior insulation: ETICS (external thermal insulation composite system) with 20 or 24 mm (0.8 or 0.95 inches) thickness.
Now, there are some interesting programs criticizing the extensive use of ETICS, claiming it is wrong, flammable, causes moisture issues between the insulation and masonry, and so on.
That’s why we came across wood fiber insulation.
This is available, for example, from Knauf or Unger.
Our architect thinks there is no reason to deviate from ETICS.
What are your opinions on this?
we are currently building a KfW70 house with about 180 m² (1,937 sq ft).
The exterior walls are made of 24 cm (9.5 inches) Poroton masonry, heating is gas plus solar for hot water.
There is no ventilation system.
The planned exterior insulation: ETICS (external thermal insulation composite system) with 20 or 24 mm (0.8 or 0.95 inches) thickness.
Now, there are some interesting programs criticizing the extensive use of ETICS, claiming it is wrong, flammable, causes moisture issues between the insulation and masonry, and so on.
That’s why we came across wood fiber insulation.
This is available, for example, from Knauf or Unger.
Our architect thinks there is no reason to deviate from ETICS.
What are your opinions on this?
einstratege schrieb:
There are some interesting programs about the craze for external thermal insulation composite systems (ETICS).
It would be wrong to say they are non-combustible, or that there is no moisture risk between the ETICS and the masonry, and so on.
[...]
Our architect says there is no reason to forgo ETICS.After all, it’s not her house.
Personally, I am not in favor of ETICS at all; the issue of combustibility definitely exists, contrary to Shism’s opinion. An interesting point in the mentioned NDR program (45 minutes) was the type of fire safety test and standards used to still certify ETICS as sufficiently fire resistant.
A building expert (structural engineer) told me when asked "ETICS or not" that he would never install something like that on his own house. For one, because of fire safety and secondly due to moisture problems, which could be caused even by very small cracks in the render layer.
His recommendation for a sound wall construction: solid masonry (Poroton or calcium silicate bricks), covered by multi-layer mineral wool insulation, with an air gap, and then brick veneer on the outside. Of course, this is significantly more expensive.
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