ᐅ Exterior walls made of aerated concrete and interior walls constructed from brick?
Created on: 27 Jan 2014 21:39
E
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!
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!
Illo77 schrieb:
Regarding cracks, you don’t need to worry because, as already mentioned, the temperature inside affects both materials almost equally... What exactly does this statement refer to? At which point is it unnecessary to be concerned about cracks?
Illo77 schrieb:
Interesting, no meaningful contribution to the original poster’s question...Your statements were not helpful to the original poster either. On the contrary, if the original poster had relied on what you said, they would have started from a completely wrong point. That is why Bauexperte’s question about whether you intend to pay damages was entirely justified.
Illo77 schrieb:
but waiting to be able to tear others apart Bringing up this sentence specifically regarding Bauexperte is almost audacious. Read through the forum and you will understand why.
Illo77 schrieb:
I simply assumed sand-lime brick because I don’t know of any red aerated concrete blocks The original poster clearly stated bricks on the inside and aerated concrete blocks on the outside. How you arrive at sand-lime bricks or red aerated concrete blocks is therefore entirely unclear.
Illo77 schrieb:
...and it is generally known that red and white should never be combined That was exactly what the original poster asked about.
Illo77 schrieb:
You can get the address, but I would rely on the construction company responsible according to the original poster...You provided the consulting service. Therefore, the original poster can turn to both parties.
B
Bauexperte14 Nov 2014 19:54Good evening,
Well, I hope I have at least made the readers of this thread (the original poster less so, as they have not recently responded here) aware of the errors in your reply.
“Criticize” is not the reason I joined this housebuilding forum. However, your answer confirms my impression of your overall behavior here on the forum; unfortunately. Every user who writes here should show enough respect to the original poster as well as to the silent and active readers to at least carefully read the question asked. If then a user’s answer is so far off that it could lead to potential harm for other users—well, I am happy to correct the information, as long as I can do so based on my professional experience.
You still haven’t understood the question properly.
To provide a reliable answer to the original poster’s question, more is needed than just referring to the shrinkage behavior of these two types of masonry units—especially when external wall insulation systems (EWIS) are involved. There is a very good study by the Fraunhofer Institute which tested the drying behavior of wall assemblies with EWIS. Taking a look at that would have saved you from posting a premature “Don’t worry”.
It is commendable that you wanted to help the original poster; it would be even more commendable if you realized that simply reading marketing information on manufacturer websites cannot be the final word. Instead, you could have pointed out that the original poster “must” ensure that their planner includes measures to prevent defects caused by the differing material properties (deformation characteristics according to DIN standards) of the wall building materials.
Best regards,
Bauexperte
Illo77 schrieb:
Interesting, no meaningful contribution to the original poster’s question at hand but just waiting to criticize others without providing a substantial answer...
Well, I hope I have at least made the readers of this thread (the original poster less so, as they have not recently responded here) aware of the errors in your reply.
“Criticize” is not the reason I joined this housebuilding forum. However, your answer confirms my impression of your overall behavior here on the forum; unfortunately. Every user who writes here should show enough respect to the original poster as well as to the silent and active readers to at least carefully read the question asked. If then a user’s answer is so far off that it could lead to potential harm for other users—well, I am happy to correct the information, as long as I can do so based on my professional experience.
Illo77 schrieb:
I simply assumed it was sand-lime brick, as red aerated concrete blocks are unknown to me.
You still haven’t understood the question properly.
Illo77 schrieb:
The shrinkage behavior of aerated concrete and sand-lime brick is (at least according to a well-known manufacturer like Xella) the same.
To provide a reliable answer to the original poster’s question, more is needed than just referring to the shrinkage behavior of these two types of masonry units—especially when external wall insulation systems (EWIS) are involved. There is a very good study by the Fraunhofer Institute which tested the drying behavior of wall assemblies with EWIS. Taking a look at that would have saved you from posting a premature “Don’t worry”.
It is commendable that you wanted to help the original poster; it would be even more commendable if you realized that simply reading marketing information on manufacturer websites cannot be the final word. Instead, you could have pointed out that the original poster “must” ensure that their planner includes measures to prevent defects caused by the differing material properties (deformation characteristics according to DIN standards) of the wall building materials.
Best regards,
Bauexperte
B
buddy201413 Mar 2015 17:00Adhering aerated concrete plan blocks.
My architect suggested building the walls of my house with aerated concrete plan blocks, having the walls cut to the correct size at the factory and glued together.
Has anyone had experience with this approach? It almost seems like a prefabricated house to me.
What are the advantages and disadvantages of this construction method?
Regards,
buddy2014
My architect suggested building the walls of my house with aerated concrete plan blocks, having the walls cut to the correct size at the factory and glued together.
Has anyone had experience with this approach? It almost seems like a prefabricated house to me.
What are the advantages and disadvantages of this construction method?
Regards,
buddy2014
EveundGerd13 Mar 2015 23:03Our aerated concrete blocks were bonded on site.
What is the advantage of the method described above?
With “prefabricated walls,” a crane is usually needed to install the walls, which then increases the overall cost of the project. Not to mention the transportation of the walls. Or am I mistaken?
What is the advantage of the method described above?
With “prefabricated walls,” a crane is usually needed to install the walls, which then increases the overall cost of the project. Not to mention the transportation of the walls. Or am I mistaken?
Although I am not familiar with this specific product, I do know about systems for prefabricated walls, which are processed mechanically. This means much more precise bonding (from experience, too much adhesive is used on-site, resulting in thicker joints and greater thermal bridging), and the process is significantly faster. Additionally, the finished wall or walls can be quickly and easily erected on-site in dry weather, allowing the building to be sealed against the weather much sooner, avoiding an open shell structure. This method is primarily used during seasons like this or in autumn/winter.
I would estimate that the costs remain about the same whether a few workers spend several days manually applying adhesive on-site (possibly handling large panels with a small crane, which also incurs costs) or a truck transports the prefabricated walls.
I would estimate that the costs remain about the same whether a few workers spend several days manually applying adhesive on-site (possibly handling large panels with a small crane, which also incurs costs) or a truck transports the prefabricated walls.
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