Poroton T14 or aerated concrete climate standard PP2

Hello everyone,
with my developer I have the choice between Poroton bricks and the above-mentioned aerated concrete. The wall thickness is a total of 36.5 cm for both building materials. My gut feeling tends more towards Poroton bricks. However, I would be very happy to be proven otherwise. I would greatly appreciate feedback on the advantages and disadvantages...

Thank you very much in advance and best regards.
eliot398

One could discuss this for days

Hello,

Hello everyone,
With my builder, I have the choice between Poroton bricks and the aforementioned aerated concrete. The wall thickness is a total of 36.5 cm for both materials. My gut feeling tends more towards Poroton bricks.

Gut feeling is not necessarily the best advisor.
It is partly a subjective assessment which is also based on experience. In the case of self-construction, the question is irrelevant; here aerated concrete is clearly ahead! Whether it has to be this particular manufacturer is also debatable. However, this question does not arise here, as the work will be carried out by a company.
The insulating effect is based on the inclusion of air pores. The smaller these are and the better they are isolated/separated from each other, the lower the thermal conductivity. => Advantage aerated concrete
However, with increasing insulation performance, compressive strength (load transfer and input, especially local force application) as well as heat storage capacity suffer. => Advantage Poroton.
Problems that are often neglected. In addition, here, if PP2 is meant, building materials with different thermal conductivities are being compared, i.e. the comparison is flawed in this regard.
Furthermore, everything is simply expected from the building material: very good thermal insulation, best summer heat protection, and high mechanical load capacity. That only a compromise is possible here goes without saying.

Regards

NB: The best and cheapest energy is the one that is not needed. In other words: Exclusively 36.5/0.14 I do not consider very future-oriented.
Aerated concrete with Lambda = 0.09 W/mK is in my opinion no longer to be called stone!

Topic Moisture + Thermal Conductivity

Hello €uro,

Thank you for your reply. My gut feeling resulted from various forum posts that I found here. What worries me, among other things, is that the pores in PB apparently prefer to absorb moisture rather than release it?! During frequent rainy days throughout the construction period, this certainly plays a role, doesn’t it? Furthermore, the PB should be stored as dry as possible during the construction phase, right? This is a point that I could only monitor to a limited extent. Intensive drying after the construction phase is probably essential, isn’t it? Regarding the Lambda value, PB with 0.09 W/MK is, however, far superior to the Poroton brick with 0.14 W/MK. A direct comparison is therefore actually – as you already mentioned – not really possible...

You conclude by saying that PB with 0.09 W/MK should not really be considered more than stone. Is this from your side just a neutral observation/opinion, or can I also hear some criticism in it? Due to the high air inclusions, abrasion during processing would then be enormous, wouldn’t it...?!

Best regards Eliot398

How should the topic of sound insulation be considered?

Hello,

....Thank you for your answer. My gut feeling resulted from various forum posts I found here.

Forum posts cannot replace professional advice, especially since the goals and intentions of the participants are quite different.

....
What bothers me, among other things, is that with PB the pores apparently prefer to absorb moisture rather than release it?! Frequent rainy days during the construction period surely play a role, right? Furthermore, the PB should be stored as dry as possible during the construction period, correct? That is a point I could only monitor to a limited extent. Intensive drying after the construction phase is probably indispensable, isn’t it?

These are pseudo-arguments against PB. With proper processing, e.g. covering the wall crowns, all of this is insignificant, unless there is botched work!

...., or can I also hear some criticism from this?

Yes, it is a criticism. This PB stone I have not used and would not use!

....
How should the topic of sound insulation be considered?

The higher the density, the better the sound and summer thermal insulation, but the worse the thermal insulation in winter! This basically only leads to => multilayer wall construction!

Best regards

Hello, Yes, it is a criticism. These PB stones I do not have and would not use! best regards

Hello, what do you think is wrong with "these" PB stones... Let's assume the workmanship was flawless... I am really a complete layman here! Where can I get impartial professional advice? Many greetings

Hello,

Hello, what do you think speaks against "these" PB-stones...

!!!!

...Where can I get impartial professional advice?

Everywhere where sales, construction, installation or mediation are not in one hand! Provided the appropriate qualification!
Since you are involved with a GU/GÜ project (not BT), there should be a need, as the risks are greatest here. Logical, since the number at the end of the offer is also the lowest.
This does not refer exclusively to the building structure, but especially to the building services engineering.

best regards