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!
O
Obstlerbaum20 Aug 2018 20:58Ask your construction company which exact material will be used and review the technical data sheet. This then needs to be considered in relation to the noise levels at the building site. On a busy main road, using just calcium silicate brick (sand-lime brick) is not sufficient; you also need to optimize the windows (and keep them closed). In a dead-end street of a quiet residential area, however, this is usually not a problem.
Bauherr&-frau20 Aug 2018 21:03We have another meeting scheduled for tomorrow and would like to ask a few follow-up questions. After reading your answers to my wife, she, like me, is now leaning more towards calcium silicate blocks.
Two more questions to help us rest easy:
1) Is the option of calcium silicate blocks plus external thermal insulation composite system (ETICS) significantly more expensive or not?
2) Using Ytong 36.5cm (14.4 inches) on the outside and calcium silicate blocks on the inside: is this still a viable option?
Two more questions to help us rest easy:
1) Is the option of calcium silicate blocks plus external thermal insulation composite system (ETICS) significantly more expensive or not?
2) Using Ytong 36.5cm (14.4 inches) on the outside and calcium silicate blocks on the inside: is this still a viable option?
Using Ytong on the outside and sand-lime brick on the inside doesn’t help much against road noise. Sand-lime brick with external thermal insulation composite system (ETICS) is more expensive. The builder will tell you how much. It’s an additional work step, and it takes longer to build because Ytong can be erected especially quickly. Labor costs!
T
Traum201921 Aug 2018 14:43There are Ytong blocks with enhanced sound insulation properties. You can ask your trusted building materials supplier or developer about them.
Alternatively, some aerated concrete manufacturers offer a combined block:
125 mm (5 inches) aerated concrete on the outside
100 mm (4 inches) rigid foam core insulation in the middle
175 mm (7 inches) aerated concrete on the inside
All in a single block.
Alternatively, some aerated concrete manufacturers offer a combined block:
125 mm (5 inches) aerated concrete on the outside
100 mm (4 inches) rigid foam core insulation in the middle
175 mm (7 inches) aerated concrete on the inside
All in a single block.
Bauherr&-frau21 Aug 2018 14:56Just finished a call with Ytong. It was a professional consultation. They recommended (without knowing the exact conditions on site, so this is tentative) continuing with a Ytong 36.5 PP2 0.35 / 0.009. They told me that the windows especially need to have very good sound insulation because otherwise even the best calcium silicate block wall won’t make much difference—particularly in a two-story urban villa with large window areas.
Additionally, with calcium silicate blocks, there is a high risk that the external thermal insulation composite system (ETICS) could actually increase sound transmission, so you don’t really benefit from the calcium silicate blocks. That’s why we should stick with the 36.5 Ytong block, use good sound insulating windows, and especially consider a solid Ytong roof because people often underestimate how noisy a wooden roof structure can be.
The consultant also mentioned that a decorative cladding structure made of wood or similar materials on the house facade facing the paved street could be an option.
We plan to measure the actual sound levels this weekend and see how it looks. Ytong recommended this as well because only the real environmental values can provide clarity on the required sound insulation.
What I have learned so far: sound insulation and thermal insulation unfortunately don’t go hand in hand.
And does this improve the sound insulation significantly?
Additionally, with calcium silicate blocks, there is a high risk that the external thermal insulation composite system (ETICS) could actually increase sound transmission, so you don’t really benefit from the calcium silicate blocks. That’s why we should stick with the 36.5 Ytong block, use good sound insulating windows, and especially consider a solid Ytong roof because people often underestimate how noisy a wooden roof structure can be.
The consultant also mentioned that a decorative cladding structure made of wood or similar materials on the house facade facing the paved street could be an option.
We plan to measure the actual sound levels this weekend and see how it looks. Ytong recommended this as well because only the real environmental values can provide clarity on the required sound insulation.
What I have learned so far: sound insulation and thermal insulation unfortunately don’t go hand in hand.
Traum2019 schrieb:
Outside 125 mm (5 inches) aerated concrete
Middle 100 mm (4 inches) rigid foam core insulation
Inside 175 mm (7 inches) aerated concrete. All combined in one block.
And does this improve the sound insulation significantly?
Traum2019 schrieb:
There are Ytong blocks with enhanced sound insulation values. You can ask your local building materials supplier or trusted contractor about them.
Alternatively, some aerated concrete manufacturers offer a combined block:
Outer layer: 125 mm (5 inches) aerated concrete
Center: 100 mm (4 inches) rigid foam core insulation
Inner layer: 175 mm (7 inches) aerated concrete
All in a single block.Although that sounds more like an improvement in thermal insulation rather than soundproofing...?
Bauherr&-Frau schrieb:
Just spoke with Ytong. It was a professional consultation. They recommended (without knowing the exact situation on site, so with reservations) a Ytong 36.5 PP2 0.35 / 0.009.[…] So Ytong recommends Ytong?
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