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!
Bauherr&-frau21 Aug 2018 15:09opalau schrieb:
So Ytong recommends Ytong?Yes, surprising, isn’t it? They could have also recommended their Silka calcium silicate blocks with external wall insulation systems (EWI). Since the company offers both products (Ytong and Silka calcium silicate blocks), I consider their advice quite professional.
I can only agree with the general opinion of the previous speakers.
A monolithic wall construction with Ytong and good sound insulation is not possible. With an RDK of 0.6 for exterior masonry, this is not surprising. Physics is physics, and even Ytong cannot change that. The sound reduction index R´w,R with Ytong stops at 49 dB.
A monolithic wall construction with Ytong and good sound insulation is not possible. With an RDK of 0.6 for exterior masonry, this is not surprising. Physics is physics, and even Ytong cannot change that. The sound reduction index R´w,R with Ytong stops at 49 dB.
Bauherr&-frau21 Aug 2018 16:41Then, a warm welcome to sand-lime brick – the developer is currently revising the offer. Are there any recommendations for the construction of a monolithic exterior wall with sand-lime bricks – thickness of the bricks, thickness of the external thermal insulation composite system (ETICS) / external wall insulation?
Monolithic construction and sand-lime brick are practically incompatible; combining them would be very expensive and result in very thick walls. The thickness of the external thermal insulation composite system (ETICS) is determined by the energy-saving regulation calculations.
We are using a 175 mm (7 inches) thick sand-lime brick for the exterior walls, and for non-load-bearing interior walls, either 115 mm (4.5 inches) or 175 mm (7 inches), depending on the structural calculations.
Regarding sound insulation, you can choose a sand-lime brick with a higher bulk density, which adds more mass and provides better soundproofing.
Have you considered having the house clad with facing brick? In combination with sand-lime brick, this would create a very effective wall construction.
We are using a 175 mm (7 inches) thick sand-lime brick for the exterior walls, and for non-load-bearing interior walls, either 115 mm (4.5 inches) or 175 mm (7 inches), depending on the structural calculations.
Regarding sound insulation, you can choose a sand-lime brick with a higher bulk density, which adds more mass and provides better soundproofing.
Have you considered having the house clad with facing brick? In combination with sand-lime brick, this would create a very effective wall construction.
Bauherr&-frau21 Aug 2018 18:15Brick cladding is unfortunately not our thing. :-(
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