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!
blaupuma schrieb:
Yes, that's true.
Then you need more insulation.
That is probably also better.I think the insulation will indeed be 2-4cm (1-2 inches) thicker, while at the same time the 17.5cm (7 inches) aerated concrete is replaced by 15cm (6 inches) calcium silicate blocks.
It’s manageable.
My buddy is building a house of a similar size at the same time.
Additional costs are about 2-3 thousand Euros, I think.
However, I consciously decided against it.
n
My buddy is building a house of a similar size at the same time.
Additional costs are about 2-3 thousand Euros, I think.
However, I consciously decided against it.
Nordlys schrieb:
Calcium silicate bricks are similarly priced to aerated concrete blocks like Ytong and similar products. But since they require significantly more labor hours, they are ultimately uneconomical.
n
Nordlys schrieb:
Sand-lime brick is about as expensive as Ytong and similar products. But since it takes significantly more labor hours, it ends up being uneconomical.The brick is cheaper.
Here, one floor of exterior wall with two protruding edges took about 2.5–3 days. I think you might be overestimating the labor costs for stacking the bricks.
Moreover, sand-lime bricks are often used as smooth-faced bricks with alignment aids. It’s like Lego for adults.
Bauherr&-frau21 Sep 2018 16:17I need to bring this up again because I’m about to lose it. We recently got the contact details of a trusted expert from our architect (a specialist in acoustics and thermal insulation). His first words were: “Ytong is basically just foamed air. There is practically no sound insulation; from a building physics perspective, you can’t argue otherwise.” I thought to myself: great.
He gave us excellent advice and said that every type of block has its purpose, but it needs to be well thought out. However, he would advise against using 36.5 cm (14 inches) Ytong. He said that 17.5 or 20 cm (7 or 8 inches) sand-lime brick with a raw density of 1.8 plus an external thermal insulation composite system (ETICS) would be perfectly fine—you’d be looking at about 55 dB of sound insulation, which is pretty good. Interior drywall is also suitable.
We are now considering a 24 cm (9.5 inches) sand-lime brick plus insulation. How thick should the ETICS be to meet the 2016 energy saving regulations (building permit/planning permission)?
Now a question again for you, as independent experts—is this accurate, and is the extra cost really that much higher compared to Ytong?
Building is exhausting.
He gave us excellent advice and said that every type of block has its purpose, but it needs to be well thought out. However, he would advise against using 36.5 cm (14 inches) Ytong. He said that 17.5 or 20 cm (7 or 8 inches) sand-lime brick with a raw density of 1.8 plus an external thermal insulation composite system (ETICS) would be perfectly fine—you’d be looking at about 55 dB of sound insulation, which is pretty good. Interior drywall is also suitable.
We are now considering a 24 cm (9.5 inches) sand-lime brick plus insulation. How thick should the ETICS be to meet the 2016 energy saving regulations (building permit/planning permission)?
Now a question again for you, as independent experts—is this accurate, and is the extra cost really that much higher compared to Ytong?
Building is exhausting.
Bauherr&-frau21 Sep 2018 16:43And one more question: what is the Rw value of the Ytong 36.5 PP2 with a 0.08 U-value, and what is the Rw value of the 24 cm (9.5 inches) sand-lime brick? I’m having trouble understanding all the technical datasheets.
Do I need to subtract the Rw value from the noise level to find the sound level inside the room?
So, if the noise source is 5–6 m (16–20 feet) away and produces about 65–70 dB at its origin, would the indoor noise level behind a 24 cm (9.5 inches) sand-lime brick with 55 dB sound insulation be about a maximum of 15 dB? Is my calculation correct?
Do I need to subtract the Rw value from the noise level to find the sound level inside the room?
So, if the noise source is 5–6 m (16–20 feet) away and produces about 65–70 dB at its origin, would the indoor noise level behind a 24 cm (9.5 inches) sand-lime brick with 55 dB sound insulation be about a maximum of 15 dB? Is my calculation correct?
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