ᐅ Y-Tong (aerated concrete) – a quality building material? (Sound insulation!)
Created on: 20 Aug 2018 19:58
B
Bauherr&-frau
Dear Forum,
Our developer plans to use "Ytong PPW2 d = 36.5 cm (14.4 inches) for the exterior walls according to the scope of work. Inside, 17.5 cm (6.9 inches). On the outside, a 3 mm (0.1 inch) mineral-based lightweight plaster will be applied. To me, this seems somewhat minimal compared to the insulation and materials others are using.
We are wondering if the thermal insulation requirements are met without additional insulation? And what about mold and ventilation? A air-to-water heat pump with underfloor heating is planned.
What worries us even more is the soundproofing, since we have a cobblestone street right outside. A friend who is an engineer told me yesterday that Ytong has "poor sound insulation properties."
So even triple-glazed windows with enhanced soundproofing probably won’t help much? [B] I would appreciate honest clarification and possibly some alternative suggestions. We are not experts and I don’t want to hear every car! Some friends of ours build with calcium silicate blocks and are very satisfied. Their father is an architect and swears by them.
Many thanks and best regards! We would be lost without you!
Our developer plans to use "Ytong PPW2 d = 36.5 cm (14.4 inches) for the exterior walls according to the scope of work. Inside, 17.5 cm (6.9 inches). On the outside, a 3 mm (0.1 inch) mineral-based lightweight plaster will be applied. To me, this seems somewhat minimal compared to the insulation and materials others are using.
We are wondering if the thermal insulation requirements are met without additional insulation? And what about mold and ventilation? A air-to-water heat pump with underfloor heating is planned.
What worries us even more is the soundproofing, since we have a cobblestone street right outside. A friend who is an engineer told me yesterday that Ytong has "poor sound insulation properties."
So even triple-glazed windows with enhanced soundproofing probably won’t help much? [B] I would appreciate honest clarification and possibly some alternative suggestions. We are not experts and I don’t want to hear every car! Some friends of ours build with calcium silicate blocks and are very satisfied. Their father is an architect and swears by them.
Many thanks and best regards! We would be lost without you!
One more thing, bookstar, the builder appears to be using sand-lime bricks or aerated concrete blocks, not traditional clay bricks. The further north you go, the less common clay bricks become; why exactly is unclear, it’s just the way it is. While in Baden-Württemberg, it’s rare to find a builder using aerated concrete blocks. Objectively, both systems work. Both are similarly priced and both have the challenge of balancing sound insulation with thermal performance. The better the insulation, the worse the noise insulation.
Bauherr&-Frau schrieb:
Unfortunately, brick cladding is just not our thing. :-(However, a cavity wall is definitely a great solution when it comes to sound insulation!
Here is a 1990s timber frame building, but with insulation and a brick veneer curtain wall. According to the datasheet, it has a 56 dB facade. And it really sounds like that indoors...
Bauherr&-Frau schrieb:
In another forum post, someone wrote: "ETICS with calcium silicate/high-hole brick or aerated concrete doesn’t differ much in price, depending on what the shell builder uses more of." My main principle is this: the masonry material the builder has the most experience working with is, overall, the better choice than a material with theoretically better properties but unfamiliar to the builder. The same applies to trying to "retrain" a builder regarding the preference for monolithic or composite wall structures. At every corner and connection to other building elements, it pays off if the builder is accustomed to working with their chosen product.
Bauherr&-Frau schrieb:
2) Ytong 36.5 cm (14.4 inches) on the outside and calcium silicate brick on the inside: is this combination still being considered? If you mean deciding separately between solid brick and aerated concrete for the outer and inner walls: yes, this is a commonly considered combination. However, if you mean an outer shell of Ytong and an inner shell of calcium silicate brick: I would seriously question this "Columbus egg" solution.
Traum2019 schrieb:
Alternatively, there are also aerated concrete manufacturers offering a combined block: I am not familiar with that product yet. What is it called on the market, and are there one or several manufacturers?
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