ᐅ Experience with lightweight aerated concrete blocks (KLB) for masonry?
Created on: 18 Dec 2019 09:33
J
joltHello everyone,
For our shell construction, our architect specified 24cm (9.5 inches) sand-lime brick walls with external thermal insulation composite system (ETICS). However, as clients, we are open to a monolithic construction method and would even prefer it if necessary. After researching various forums, it seems there are countless opinions on ETICS versus monolithic walls, as well as on Poroton versus aerated concrete (Ytong) and similar materials. Therefore, the usual recommendation seems to be to choose what the shell builder offers and has experience with. Ultimately, the performance values, especially the U-value, are what matter most. What is your view on this?
We have now received a good offer for the shell construction. This builder proposed using lightweight clay blocks (KLB) for the walls. Based on the specifications, he initially suggested 24cm (9.5 inches) blocks but is also willing to build monolithically with 36.5cm (14.4 inches) blocks.
I was not familiar with lightweight clay blocks (KLB) until now. Therefore, I would appreciate any opinions on this material.
Thank you, and have a nice last week before Christmas.
For our shell construction, our architect specified 24cm (9.5 inches) sand-lime brick walls with external thermal insulation composite system (ETICS). However, as clients, we are open to a monolithic construction method and would even prefer it if necessary. After researching various forums, it seems there are countless opinions on ETICS versus monolithic walls, as well as on Poroton versus aerated concrete (Ytong) and similar materials. Therefore, the usual recommendation seems to be to choose what the shell builder offers and has experience with. Ultimately, the performance values, especially the U-value, are what matter most. What is your view on this?
We have now received a good offer for the shell construction. This builder proposed using lightweight clay blocks (KLB) for the walls. Based on the specifications, he initially suggested 24cm (9.5 inches) blocks but is also willing to build monolithically with 36.5cm (14.4 inches) blocks.
I was not familiar with lightweight clay blocks (KLB) until now. Therefore, I would appreciate any opinions on this material.
Thank you, and have a nice last week before Christmas.
I recently looked into this topic myself and decided to go with Poroton.
The three options—aerated concrete / Poroton / pumice concrete (KLB)—are all so similar that basically only a gut feeling can decide.
Everyone living in a house built with any of these materials says they are satisfied... Great indoor climate... Great sound insulation...
The price differences for me were also not that significant:
Poroton was €1100 (about $1200) more expensive than aerated concrete
Pumice concrete was €2300 (about $2500) more expensive than aerated concrete
Materials including labor for 150m² (1615 sq ft) of living space
The thermal performance values of the cost-effective versions of these options are also about the same.
Even though this probably doesn’t make your decision any easier.
The three options—aerated concrete / Poroton / pumice concrete (KLB)—are all so similar that basically only a gut feeling can decide.
Everyone living in a house built with any of these materials says they are satisfied... Great indoor climate... Great sound insulation...
The price differences for me were also not that significant:
Poroton was €1100 (about $1200) more expensive than aerated concrete
Pumice concrete was €2300 (about $2500) more expensive than aerated concrete
Materials including labor for 150m² (1615 sq ft) of living space
The thermal performance values of the cost-effective versions of these options are also about the same.
Even though this probably doesn’t make your decision any easier.
My mantra is to use the stone your builder knows best. I live in an area with pumice stone; here, people have been successfully building for decades with both KLB and Bisotherm. Using the search terms "11ant WDVS," "Mantra," "Rotmaurer," or "Weißmaurer," you should find everything I have ever said about this recurring topic (or FAQ). My personal favorite would be monolithic KLB (as mentioned, equivalent to Bisotherm).
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Well, whether to use ETICS (External Thermal Insulation Composite System) or a monolithic construction should be decided first. Otherwise, the quotations won’t be comparable.
Regarding the 24 cm (9.5 inch) sand-lime bricks, the question is why a 17.5 cm (7 inch) version can’t be used, meaning the price would be lower. However, the cost of the ETICS still needs to be added.
A 24 cm (9.5 inch) aerated concrete block wall built monolithically will be too thin, so a meaningful comparison would be, for example, a 36.5 cm (14 inch) aerated concrete block versus a 17.5 cm (7 inch) sand-lime brick with ETICS.
Regarding the 24 cm (9.5 inch) sand-lime bricks, the question is why a 17.5 cm (7 inch) version can’t be used, meaning the price would be lower. However, the cost of the ETICS still needs to be added.
A 24 cm (9.5 inch) aerated concrete block wall built monolithically will be too thin, so a meaningful comparison would be, for example, a 36.5 cm (14 inch) aerated concrete block versus a 17.5 cm (7 inch) sand-lime brick with ETICS.
guckuck2 schrieb:
A 24 cm (9.5 inch) KLB built as a single-layer wall will be too thin, meaning a more meaningful comparison would be, for example, a 36.5 cm (14.4 inch) KLB versus a 17.5 cm (6.9 inch) sand-lime brick with external thermal insulation (ETICS). No, I understood the original poster or their shell builder to mean a meaningful comparison would be 24 cm (9.5 inch) KLB plus ETICS (for comparability with the other offer) versus 36.5 cm (14.4 inch) monolithic construction (as the homeowner’s preference). I agree with this view.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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