The ideal wall structure in a solid house

The healthier stone is the ....

Someday I will still write my book on the best building mistakes

With a 36.5 cm stone thickness – reduced to the essentials – there is only one single difference when deciding between aerated concrete or Poroton: when drilling, white dust falls out of the former and red from the latter

Rhenish greetings

Hello,

I am also aware that manufacturers incorporate their sales arguments, and even if Ytong is just a mix of sand, gravel, and other materials, and Poroton consists of clay and is therefore the natural stone, the building biologist would say. For pipe builders, Ytong is suitable because it is easier to work with, and for the building biologist, the red one, because it is the natural stone. And both would be fine with us because we, as non-experts, would agree with the apparent arguments.

So, we still do not know what is best. As said, Ytong is cheaper with the same or better insulation properties, but worse in soundproofing....

Good evening,

... if it is that Ytong is just tossed together from sand, gravel, and other substances, and Poroton consists of clay and is thus the natural stone, the building biologist would say.

I always have to smile when I read statements of this kind; but since it fits so nicely right now, I have to allow myself a little smart-ass comment

**Poroton, components in the raw mass (in vol.-%):

70-90% clay, loam, marl
0-15% sand
0-15% limestone
<1% other
further possible:
up to 10% coal dust or limestone powder or up to 20% polystyrene or cellulose fibers

Note: the widely used Unipor® brick shows only 10-40 % (vol.-%) clay content.


**Aerated concrete (in vol.-%):

80% air
20% burnt lime, quartz sand, and water

As said, Ytong is cheaper with the same or better thermal insulation properties ...

***TThermal insulation Poroton:

The heat absorbed by the solid brick walls, which is removed from the room, is only released back into the room when it is cooler outside, allowing the excess heat to be dissipated through natural ventilation. This ability of the brick for phase shift and amplitude damping of temperature has always been used in southern countries by building massive brick houses (without additional air conditioning).

***TThermal insulation Aerated concrete:

Aerated concrete is the only solid building material with a thermal conductivity from 0.09 W/(mK) in the raw density classes 0.30, 0.35, and 0.40. This means: even a single-layer 30 cm thick wall provides a thermal transmittance coefficient U = 0.28 W/(m2K). With a wall thickness of 36.5 cm, the U-value drops to 0.23.
 In external wall areas, the requirements of the Energy Saving Ordinance (Energieeinsparverordnung) can thus be met and even exceeded without additional insulation measures. Moreover: the homogeneous wall structure allows nearly thermal bridge-free constructions. A plastered single-layer wall made of aerated concrete is considered airtight according to the Energy Saving Ordinance without additional measures.

but worse in sound insulation....

***SSound insulation Poroton:

Already 30 cm or 36.5 cm thick single-layer exterior walls made of lightweight bricks with light mortar masonry and plastered on both sides generally meet the requirements of DIN 4109 "Protection against external noise."

The requirements for sound insulation for partition walls set out in DIN 4109 are easily met with walls made of bricks with raw densities up to 2.4 kg/dm³.

***SSound insulation Aerated concrete:

Aerated concrete relativizes the physical principle “The heavier a component, the better the airborne sound insulation.” Because aerated concrete, due to its porous structure, has a kind of internal damping. Also,
DIN 4109 takes this into account: aerated concrete walls with an area-related mass up to 250 kg/m2 receive a bonus of 2 dB. New component measurements even show further improvements. With walls and solid roofs made of aerated concrete, all external noise level ranges can be covered acoustically.

After suitability test III for DIN 4109, requirements for increased sound insulation are even met with two-shell party walls made of aerated concrete with 17.5 cm PP4-0.6 each and a 50 mm cavity filled completely with mineral insulation.

There is no "one" stone; this should always be decided based on the specific construction project and personal preferences. Therefore – as I wrote: one crumbles white, the other red

**Source: Forum, sustainable building
***Source: my homepage


Rhenish greetings

Hello,

I also understand that manufacturers incorporate their sales arguments, and if it is that Ytong is just a mix of sand, gravel, and other materials and Poroton consists of clay and is therefore the natural stone, the building biologist would say so.
.

So that the whole sentence—and it was not meant seriously, I thought that was clear. Well, the building biologist conveyed it more or less like that; for him, aerated concrete is the devil of stones.

To cut it short, which do you prefer? And why?

Thanks and regards

To shorten it, which do you prefer? And why?

Aerated concrete is easier to work with, with hollow clay bricks the plasterer has to compensate for tolerances caused by the firing process. And for us it is exclusively important that we can dispense with ETICS using one or the other stone. Ergo I have no preferences for or against. Rhenish regards

You always forget the god beneath the stones