ᐅ Poroton T14 or Autoclaved Aerated Concrete (AAC) Klimanorm PP2
Created on: 21 May 2010 08:09
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eliot398Hello everyone,
With my developer, I have the choice between Poroton bricks and the mentioned aerated concrete. The wall thickness is 36.5 cm (14.4 inches) for both materials. My gut feeling leans more toward Poroton bricks. However, I would be glad to be convinced otherwise. I would appreciate any feedback on the advantages and disadvantages of both options.
Thank you in advance and best regards.
eliot398
With my developer, I have the choice between Poroton bricks and the mentioned aerated concrete. The wall thickness is 36.5 cm (14.4 inches) for both materials. My gut feeling leans more toward Poroton bricks. However, I would be glad to be convinced otherwise. I would appreciate any feedback on the advantages and disadvantages of both options.
Thank you in advance and best regards.
eliot398
This could be debated for days
Hello,
It is partly a subjective assessment based on experience. In the case of self-building, the question becomes irrelevant—here, aerated concrete is clearly preferable! Whether it has to be this particular manufacturer is also up for debate. However, this question does not apply here, as the work will be carried out by a company.
The insulation effect relies on the entrapment of air pores. The smaller these pores 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 application, especially local point loads) as well as thermal mass suffer. => Advantage Poroton.
These are issues that are often overlooked. Also, if PP2 (a specific material) is meant here, materials with different thermal conductivities are being compared, so the comparison is somewhat flawed.
Furthermore, too much is expected from the building material alone—very good thermal insulation, excellent summer heat protection, and high mechanical strength. It goes without saying that only a compromise is possible here.
Best regards,
PS: The best and most cost-effective energy is the energy not needed. In other words: simply using 36.5cm (14 inches) divided by 0.14 is not very future-proof in my opinion.
Aerated concrete with a lambda value of 0.09 W/mK is, in my opinion, no longer to be considered a type of stone!
Hello,
eliot398 schrieb:Gut feeling is not necessarily the best advisor.
Hello everyone,
With my builder, I have the choice between Poroton bricks and the aforementioned aerated concrete. The wall thickness for both materials is a total of 36.5cm (14 inches). My gut feeling leans more towards Poroton bricks.
It is partly a subjective assessment based on experience. In the case of self-building, the question becomes irrelevant—here, aerated concrete is clearly preferable! Whether it has to be this particular manufacturer is also up for debate. However, this question does not apply here, as the work will be carried out by a company.
The insulation effect relies on the entrapment of air pores. The smaller these pores 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 application, especially local point loads) as well as thermal mass suffer. => Advantage Poroton.
These are issues that are often overlooked. Also, if PP2 (a specific material) is meant here, materials with different thermal conductivities are being compared, so the comparison is somewhat flawed.
Furthermore, too much is expected from the building material alone—very good thermal insulation, excellent summer heat protection, and high mechanical strength. It goes without saying that only a compromise is possible here.
Best regards,
PS: The best and most cost-effective energy is the energy not needed. In other words: simply using 36.5cm (14 inches) divided by 0.14 is not very future-proof in my opinion.
Aerated concrete with a lambda value of 0.09 W/mK is, in my opinion, no longer to be considered a type of stone!
Topic: Moisture and Thermal Conductivity
Hello €uro,
Thank you for your response. My gut feeling comes from various forum posts I found here. One concern I have is that with aerated concrete (PB), the pores apparently absorb moisture rather than release it easily, right? Frequent rainy days during construction probably play a role here, don’t they? Also, the aerated concrete should ideally be stored as dry as possible during the construction phase, correct? This is something I could only monitor to a limited extent. Intensive drying after the construction phase is likely essential, isn’t it? Regarding the lambda value, aerated concrete with 0.09 W/mK is clearly superior to Poroton brick at 0.14 W/mK. So, as you already mentioned, a direct comparison is actually not quite possible...
At the end, you mentioned that with a value of 0.09 W/mK, aerated concrete essentially cannot be considered different from brick anymore. Is this statement from your side just a neutral observation/opinion, or should I read some criticism into it? Due to the high air content, wouldn’t the abrasion during handling be significantly higher as well...?
Best regards
eliot398
How should the topic of sound insulation be considered?
Hello €uro,
Thank you for your response. My gut feeling comes from various forum posts I found here. One concern I have is that with aerated concrete (PB), the pores apparently absorb moisture rather than release it easily, right? Frequent rainy days during construction probably play a role here, don’t they? Also, the aerated concrete should ideally be stored as dry as possible during the construction phase, correct? This is something I could only monitor to a limited extent. Intensive drying after the construction phase is likely essential, isn’t it? Regarding the lambda value, aerated concrete with 0.09 W/mK is clearly superior to Poroton brick at 0.14 W/mK. So, as you already mentioned, a direct comparison is actually not quite possible...
At the end, you mentioned that with a value of 0.09 W/mK, aerated concrete essentially cannot be considered different from brick anymore. Is this statement from your side just a neutral observation/opinion, or should I read some criticism into it? Due to the high air content, wouldn’t the abrasion during handling be significantly higher as well...?
Best regards
eliot398
How should the topic of sound insulation be considered?
Hello,
Forum posts cannot replace professional advice, especially since the goals and intentions of participants can vary greatly.
These are pseudo-arguments against PB. With proper installation, e.g., covering the wall tops, this is all insignificant unless the work is poorly done!
The higher the density, the better the sound and summer thermal insulation, but the worse the thermal insulation in winter! The conclusion is basically only one => multilayer wall construction!
Regards
eliot398 schrieb:
....Thank you for your response. My gut feeling was based on various forum posts I found here.
Forum posts cannot replace professional advice, especially since the goals and intentions of participants can vary greatly.
eliot398 schrieb:
....
What worries me, among other things, is that with PB the pores apparently tend to absorb moisture rather than release it?! During frequent rainy days in the construction period, this must surely play a role, right? Furthermore, PB should be stored as dry as possible during construction, correct? This is a point I could only monitor to a limited extent. Intensive drying after the construction phase is probably essential, right?
These are pseudo-arguments against PB. With proper installation, e.g., covering the wall tops, this is all insignificant unless the work is poorly done!
eliot398 schrieb:Yes, it is a criticism. These PB blocks I have and would not use!
...., or can I also hear some criticism here?
eliot398 schrieb:
....
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! The conclusion is basically only one => multilayer wall construction!
Regards
€uro schrieb:
Hello,
Yes, this is a criticism. I have and would not use these PB blocks!
Best regards.Hello, what exactly do you think is wrong with "these" PB blocks...
Let's assume the installation is flawless...
I am really a complete beginner here! Where can I get impartial professional advice?
Best regards
Hello,
Anywhere where sales, construction, installation, or brokerage are not handled by the same party! Provided the necessary qualifications are in place!
Since you are involved in a general contractor/project manager project (not a turnkey contract), there is likely a need, as the risks are greatest here. That makes sense, since the final price tends to be the lowest.
This does not apply exclusively to the building structure, but especially to the building services systems.
Best regards
eliot398 schrieb:!!!!
Hello, what do you think speaks against "these" PB-blocks...
eliot398 schrieb:
...Where can I get impartial expert advice?
Anywhere where sales, construction, installation, or brokerage are not handled by the same party! Provided the necessary qualifications are in place!
Since you are involved in a general contractor/project manager project (not a turnkey contract), there is likely a need, as the risks are greatest here. That makes sense, since the final price tends to be the lowest.
This does not apply exclusively to the building structure, but especially to the building services systems.
Best regards
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