Hello,
As mentioned in the title, we are building with Ytong to achieve KfW55 standard.
Now our construction company has offered to build with 36.5 cm (14 inches) Ytong blocks instead of 24 cm (9.5 inches) Ytong plus 12 cm (5 inches) of full thermal insulation.
Advantages according to the construction company:
1. All values for KfW55 are met just the same.
2. Fastenings on the exterior wall, e.g. satellite dish, awning, etc., would be much easier to install because it’s solid masonry directly, without soft insulation.
3. Our site manager considers the insulation a sort of "hazardous waste" from his point of view, as its production and disposal are quite energy-intensive...
Disadvantages: none?? Price-wise it would make no difference for us.
What do you think?
Especially point 2 appeals to me...
Point 3 is just a personal opinion and therefore secondary for now.
Thanks and best regards to everyone!
As mentioned in the title, we are building with Ytong to achieve KfW55 standard.
Now our construction company has offered to build with 36.5 cm (14 inches) Ytong blocks instead of 24 cm (9.5 inches) Ytong plus 12 cm (5 inches) of full thermal insulation.
Advantages according to the construction company:
1. All values for KfW55 are met just the same.
2. Fastenings on the exterior wall, e.g. satellite dish, awning, etc., would be much easier to install because it’s solid masonry directly, without soft insulation.
3. Our site manager considers the insulation a sort of "hazardous waste" from his point of view, as its production and disposal are quite energy-intensive...
Disadvantages: none?? Price-wise it would make no difference for us.
What do you think?
Especially point 2 appeals to me...
Point 3 is just a personal opinion and therefore secondary for now.
Thanks and best regards to everyone!
Schischka schrieb:
Regarding ETICS insulation.
Yes, it is hazardous waste that most waste disposal companies no longer accept.
The stuff is usually so poor quality that you can see it falling apart; it always has to be cheap. Nonsense...
Firstly, it is currently no longer classified as hazardous waste. Also, the problem with disposal was related to the flame retardant, not the insulation material itself.
It's funny how everyone complains about the insulation on the wall but at the same time puts it under the slab. Equally interesting is that many people, for example, consume their yogurt packaged in this so-called hazardous waste...
Schischka schrieb:
What most people don't know is that these materials become liquid when heated and run down the walls. Temperatures as low as 50°C (122°F) are enough. Actually, it only melts at about 100°C (212°F). Moreover, the insulation is covered with render, so the sun cannot raise temperatures that high.
The render also protects the insulation from UV radiation, which prevents degradation.
Schischka schrieb:
Many building experts claim that these lose their insulation performance and become useless after 20 years. That is fake news... I only know of studies that have found the opposite.
Knallkörper schrieb:
We were just talking about cavity walls with core insulation, weren’t we? Otherwise, I basically agree with you on the topic of ETICS.The current construction market is largely driven by the need to sell building loans. Financing packages typically include a KfW subsidy as an added bonus, which in turn relies on calculated energy savings that are best achieved using industrial products with specific characteristics. To ensure that the subsidies don’t just break even, the process must be technically simple (for example, by sticking insulation boards directly onto the wall as a quick work step). Nonsense has to be profitable; otherwise, nobody would buy it. Anyone who has ever taken a TV out of its box knows that foam material is not impact-resistant. But the desire to build blinds people. Facts are often party poopers as well.
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P
Peanuts746 Mar 2017 14:27Nordlys schrieb:
Regarding the old debate about Ytong or not. My contractor said it like this: the North builds with Ytong, the South with Poroton. It’s simply tradition. There are no real reasons behind it.And the Southwest uses sand-lime brick.
K
Knallkörper6 Mar 2017 16:05@11ant
I think you misunderstood my last post about the air gap.
I think you misunderstood my last post about the air gap.
11ant schrieb:
... To ensure that the subsidies don’t just break even, the construction process must be technically straightforward Unfortunately, an external thermal insulation composite system (ETICS) is more complex and expensive...
An ETICS can only compete in price with brick or aerated concrete if you use affordable calcium silicate blocks.
Somehow, your entire argument doesn’t hold up.
Is this the new mantra in this forum? No knowledge but always ready to comment?
tempic schrieb:
No clue about anything but always ready to comment?https://www.instagram.com/11antgmxde/
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