Hello everyone, I hope some experts here can offer me some advice. We are about to start building a single-family house. We have received several quotes from different construction companies. Each company recommends a different type of exterior wall construction, so I would like to ask for your opinion.
I am aware that this topic has been discussed many times before, but I can only find outdated information online.
The house will be built in Fürth (Bavaria). The location is relatively quiet, but there is a highway about 400 m (440 yards) away, which is barely audible from outside. The interior walls are planned to be made of sand-lime bricks.
The following materials have been proposed for the exterior walls:
- 36.5 cm (14 inches) aerated concrete (0.09)
- 36.5 cm (14 inches) porous fired clay bricks (0.10), laid with lightweight masonry mortar LM 21
- 17.5 cm (7 inches) sand-lime bricks combined with an external thermal insulation composite system (ETICS) of 150 mm (6 inches). This involves attaching rigid foam panels with a fiberglass mesh reinforcement layer to the outside of the masonry.
- Poroton T8, T7
- Liapor SL, Liapor, Super-K-Plus, etc.
I would appreciate any help and advice in making this decision.
Thank you in advance for your valuable support!
I am aware that this topic has been discussed many times before, but I can only find outdated information online.
The house will be built in Fürth (Bavaria). The location is relatively quiet, but there is a highway about 400 m (440 yards) away, which is barely audible from outside. The interior walls are planned to be made of sand-lime bricks.
The following materials have been proposed for the exterior walls:
- 36.5 cm (14 inches) aerated concrete (0.09)
- 36.5 cm (14 inches) porous fired clay bricks (0.10), laid with lightweight masonry mortar LM 21
- 17.5 cm (7 inches) sand-lime bricks combined with an external thermal insulation composite system (ETICS) of 150 mm (6 inches). This involves attaching rigid foam panels with a fiberglass mesh reinforcement layer to the outside of the masonry.
- Poroton T8, T7
- Liapor SL, Liapor, Super-K-Plus, etc.
I would appreciate any help and advice in making this decision.
Thank you in advance for your valuable support!
Jura.k schrieb:
I am aware that this topic has been discussed many times before With emphasis on “discussed.” Without a final verdict from the “Final Judgment,” but certainly not without plenty of debate. The search function will help you further: wall construction, Poroton, Ytong, ETICS (external thermal insulation composite system).
Among other things, I have already “spelled out” ETICS here: https://www.hausbau-forum.de/threads/24er-Ytong-Dämmung-oder-Ytong-36-5er.18874/page-10#post-198840, and there is almost a new chapter of this ongoing discussion every month on this forum alone. Therefore, there is hardly anything new to add.
Jura.k schrieb:
The interior masonry is planned to be made of sand-lime brick. The consensus on using sand-lime brick for interior walls comes from a special privilege of this building material: it is allowed for non-load-bearing interior walls. This significantly improves suitability for efficient masonry work.
The preference for aerated concrete or porous clay blocks for exterior walls is mostly due to cost factors. Which of these the builder prefers is as personal and equally valid as choosing between Catholicism or Protestantism. And it is just as traditionally handed down: if the father has always built with clay blocks, the son won’t even consider aerated concrete.
Technically, both materials are basically equivalent, even though their properties differ enough to earn them different criticisms: Poroton is often called a “crumbly cookie,” and Ytong is sometimes labeled as the “messy bird” of sound insulation.
In my opinion, the core issue does not justify demonizing one or the other. I recommend using the material the installer is more familiar with. I would also like to point out that there are other types of bricks—pumice or expanded clay, for example. Brand names would be KLB (climate light block), Bisotherm, Liapor, and others.
None of these materials is the ultimate solution, and for some people, each one is the subject of controversy, but none represents a real disaster.
Therefore, I think a principled debate about “which brick” is the least productive. It makes more sense to discuss this at the level of “solid masonry or ETICS.”
https://www.instagram.com/11antgmxde/
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Actually, 11 ant has said everything. It doesn’t matter. However, if you don’t want external thermal insulation composite systems (ETICS) and still want excellent insulation without using facing bricks, which the Bavarian hardly does any more than drinking pilsner, then go with Ytong 36.5. It will probably also be the most cost-effective block. Karsten
Nordlys schrieb:
Ytong 36.5cm (14.4 inches). It will probably also be the cheapest block. In Bavaria, it is likely to be more expensive than a 36.5cm (14.4 inches) Poroton block.
In the north, construction is usually done with white blocks, in the south with red ones.
RobsonMKK schrieb:
In the north, houses are built white; in the south, red... and along the Middle Rhine, gray or pinkhttps://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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