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&-frau18 Sep 2018 14:40Some posts somehow slipped past me here, sorry. By now, I can say the following. We will build with 36.5 Ytong and have ordered soundproof windows of class III. Both the architect and the window manufacturer agreed that this is perfectly fine. On the outside, we also have insulated aluminum roller shutters. I simply think that even calcium silicate brick won’t help if the windows only provide "35–39 dB" sound insulation – or am I mistaken?
We currently live in a timber frame new build from 2017, and the noise from the main road comes through the windows, not through the walls.
The bedroom is on the opposite side of the noise source, so in principle, we are quite relaxed there.
The option with clinker bricks directly on the Ytong looks quite appealing from the outside nowadays, so we are still considering it. For a 30 km/h (18.6 mph) one-way street in a village with cobblestones, that should be sufficient.
Inside, the construction specification says: "The non-load-bearing interior walls are built as metal stud walls with UW + CW profiles and double plasterboard lining. The required soundproofing is provided with 60 mm (2.4 inches) thick mineral wool insulation. The masonry knee walls are covered with a single layer of plasterboard." ==> I still have a question here: is this suitable?
We have looked at a house of a private builder with Bauherr&-frau and found everything quite decent. The interior walls felt solid and "soundproofing".
We currently live in a timber frame new build from 2017, and the noise from the main road comes through the windows, not through the walls.
The bedroom is on the opposite side of the noise source, so in principle, we are quite relaxed there.
The option with clinker bricks directly on the Ytong looks quite appealing from the outside nowadays, so we are still considering it. For a 30 km/h (18.6 mph) one-way street in a village with cobblestones, that should be sufficient.
Inside, the construction specification says: "The non-load-bearing interior walls are built as metal stud walls with UW + CW profiles and double plasterboard lining. The required soundproofing is provided with 60 mm (2.4 inches) thick mineral wool insulation. The masonry knee walls are covered with a single layer of plasterboard." ==> I still have a question here: is this suitable?
We have looked at a house of a private builder with Bauherr&-frau and found everything quite decent. The interior walls felt solid and "soundproofing".
Bauherr&-Frau schrieb:
"The non-load-bearing interior walls will be constructed as metal stud walls using UW and CW profiles with a double layer of drywall. [...] The masonry knee walls will be covered with a single layer of drywall." ==> I have a question regarding this: is that appropriate? A double layer of drywall is standard for metal stud drywall partitions in residential buildings, while a second layer is unnecessary for masonry walls. Where exactly are the knee walls going to be installed?
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Bauherr&-frau18 Sep 2018 17:5811ant schrieb:
Where are the knee walls supposed to be placed?I just copied it as is. The scope of work description hasn’t been fully adapted to our situation yet. I had to look up myself what it actually is. Apparently, it’s probably not relevant for two full stories.
blaupuma schrieb:
This is standard everywhere here.However, there are also some who build entirely with sand-lime bricks, and others who offer them for exterior walls as an alternative to aerated concrete.
opalau schrieb:
There are also some who build entirely with sand-lime bricks, and others who offer them as an alternative for external walls to aerated concrete.Yes, that’s true.
In that case, you need more insulation.
It’s probably good as well.
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