ᐅ How is the "typical wall thickness" determined for cavity walls?
Created on: 4 Nov 2021 19:48
K
karl.jonas
Hello,
I have read a lot about possible wall constructions, and it seems there is no single “right” solution, which is fine. However, when I add up the commonly recommended layers (assuming it’s better to insulate more rather than less), I end up with a cavity wall consisting of Poroton blocks on the inside and clinker bricks on the outside measuring about 1 cm (0.4 inches) (plaster) + 30 cm (12 inches) (Poroton) + 18 cm (7 inches) (mineral wool insulation) + 4 cm (1.5 inches) (ventilation gap) + 12 cm (5 inches) (clinker) = 65 cm (26 inches). On the other hand, when I search for “typical wall thickness,” I usually find values around 49 cm (19 inches) or less (for a standard KFW55 or KFW40 house). Where am I mistaken?
Karl
I have read a lot about possible wall constructions, and it seems there is no single “right” solution, which is fine. However, when I add up the commonly recommended layers (assuming it’s better to insulate more rather than less), I end up with a cavity wall consisting of Poroton blocks on the inside and clinker bricks on the outside measuring about 1 cm (0.4 inches) (plaster) + 30 cm (12 inches) (Poroton) + 18 cm (7 inches) (mineral wool insulation) + 4 cm (1.5 inches) (ventilation gap) + 12 cm (5 inches) (clinker) = 65 cm (26 inches). On the other hand, when I search for “typical wall thickness,” I usually find values around 49 cm (19 inches) or less (for a standard KFW55 or KFW40 house). Where am I mistaken?
Karl
B
Benutzer2005 Nov 2021 14:06HausTmMike schrieb:
Sand-lime brick was the best choice for good indoor air quality, right? To be completely honest, I have never noticed any difference in my previous properties (and I’m now living in my fifth home – built between the late 19th century without any insulation, renovated buildings from the 1960s – with and without exterior insulation and finish systems (EIFS) / external thermal insulation composite systems (ETICS), as well as new builds with sand-lime brick plus EIFS or cavity brick).
We chose sand-lime brick only because we wanted the facade to be finished with 2DF clinker bricks (and cavity insulation) as well as EIFS. That stone suited this combination best. Otherwise, to be frank, I couldn’t care less what kind of brick my house is built from. I consider ventilation systems essential anyway, so that always ensures good indoor air quality.
The indoor air quality was always the same. Well, almost – in my first property in my early 20s, I didn’t ventilate much. It did get a bit stuffy then 😱.
K
karl.jonas5 Nov 2021 21:2411ant schrieb:
I'm glad to hear that, and it seems you’re quite new here but have actually been quietly reading for some time (how long exactly?) before registering?I’ve been gathering information about building for about six months. One challenge is evaluating the quality of different statements. That’s where a forum like this is great, because you often learn a lot of pros and cons based on personal experiences.
karl.jonas schrieb:
I have been gathering construction information for about half a year now. One challenge is the qualitative assessment of different statements.Feel free to get in touch since you have found the way here. The qualitative assessment is actually not that difficult: the less knowledge people have, the less they can justify their opinions. You basically just need to pay attention to who is only speaking loudly but not clearly – then you can eliminate a lot, and suddenly it becomes much clearer ;-)https://www.instagram.com/11antgmxde/
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