ᐅ Exterior walls made of aerated concrete and interior walls constructed from brick?

Created on: 27 Jan 2014 21:39
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ennos2
Hello everyone,

Recently, we signed our house construction contract. Originally, the exterior walls were planned to be brick with external thermal insulation composite system (ETICS).
Instead, we chose aerated concrete (with an additional cost).

The material for the interior walls remained as stated in the contract (brick). We overlooked this. There was also no advice from the builder suggesting that using the same material for both interior and exterior walls would be recommended.

If we keep it this way: is there a risk of cracking? Does this kind of "mixed masonry" meet current technical standards? Is there any relevant DIN standard or just common sense that speaks against it?

According to the contract, we will receive a house built according to the state of the art. Preventing possible cracks using mesh tape (applied in the corners) should not be a solution, right?

What do you think?

Thank you in advance!
B
buddy2014
14 Mar 2015 12:47
Is it still a solid (masonry) house or more like a prefabricated house?
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Explosiv
14 Mar 2015 18:42
Hi
This will remain a solid masonry house.
In my case, wall-height elements up to 0.8m (32 inches) wide were factory-produced as single units, without adhesive joints within the elements. They were then delivered by truck with a trailer for our bungalow. The truck’s crane was sufficient to position the elements. The entire process was completed in one day. I have been living in the house since last July and have not noticed any problems so far.

The interior walls are built from 11cm (4.3 inches) calcium silicate bricks. On all interior walls, a top layer of upward-open U-shaped blocks made from the same material was installed, which was reinforced and filled with concrete. This ensures that all interior walls are firmly connected to each other and to the exterior walls at the joints. Additionally, during the construction of the interior walls, metal ties were driven into the porous walls so their protruding ends could be embedded in the mortar joints of the interior walls.

To date, no cracks have appeared.
S
sandra79
18 Aug 2015 13:06
Hello,
I am new here.
We want to build with solid masonry and need some advice.
Which type of concrete should we use? We were originally planning to use Poroton, but recently there was a TV report saying that toxic substances were added to the concrete (woolit).
What alternatives to Poroton would you recommend? There are also bricks made of pumice stone. Are those also advisable? What are their advantages and disadvantages?
Thank you in advance.
Sandra
24h-Trend29 Aug 2015 09:07
I would only use concrete for foundations, floor slabs, ring beams, and possibly interior stairs. Poroton are bricks. These can be ordered and priced with or without thermal insulation. Sand-lime bricks I would consider as an alternative for calculating the structural shell and thermal insulation.

I would rather buy and use pumice stones for masonry where nothing needs to be hung on it.
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Legurit
29 Aug 2015 09:58
Woolit was used until 2011 (?). If you buy Poroton bricks today, you should no longer have any issues with them.
Common bricks for exterior walls are: Poroton, aerated concrete, calcium silicate bricks, and probably pumice stone (although I have never encountered this in the northern regions).
Each type of brick has its own advantages and disadvantages... this topic has been discussed here many times – just try searching.