ᐅ Y-Tong (aerated concrete) – a quality building material? (Sound insulation!)

Created on: 20 Aug 2018 19:58

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!

11ant22 Aug 2018 16:56

#37

Golfi90 schrieb:
Does it make sense to build the exterior of a house with Ytong blocks and use sand-lime bricks for the interior walls to improve sound insulation inside the house?

From a labor cost perspective, it generally makes sense to construct the non-load-bearing interior walls separately from the exterior walls (especially using drywall, since it is suitable for such a workflow).

In my opinion, the need for soundproofing inside a single-family home is often exaggerated: the tantrum phase of children doesn’t last forever, and in the marital bedroom, you’re not exactly imitating the mating call of the stag in the picture above.

Lobster schrieb:
The bottom block of the interior walls is also Ytong in each case.

Does that mean the interior walls have a base course of blocks with a lower density class than the ones above?

opalau schrieb:
I thought that this might be problematic due to different settlement behavior, but I might be wrong.

This is often discussed here as well. It requires special measures around corners when wallpapering and isn't exactly a perfect solution.

https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/

Lobster22 Aug 2018 17:10

#38

The pictures show the following:

Unfinished interior made of white aerated concrete blocks, scaffolding, and an open window opening

Interior view of a shell construction: white aerated concrete blocks, stairs on the left, bucket and building materials.

Unfinished construction site with gray concrete blocks; bucket, cement bags, and tools in the foreground.

Shell construction made of white concrete blocks with door openings; view through several openings to the garden beyond.

Alex8522 Aug 2018 17:17

#39

They say white on white would work.

11ant schrieb:
Does that mean the interior walls have a bonding layer (kimmstein) of a lower density class than what is built on top of it???

That was probably more of a sand-lime brick bonding layer.

11ant schrieb:
In my opinion, the need for soundproofing inside a single-family house is overrated:

I completely disagree. 11-17cm (4–7 inches) of perforated clay blocks is, in my view, like cardboard—everything passes through. Toilet noises, conversations, TV from the next room. It’s not about loud shouting but normal everyday sounds that disturb when one person wants to sleep and the other is still awake.

opalau22 Aug 2018 17:20

#40

Lobster schrieb:
You can see it in the pictures:

Huh? The exterior walls are visible in the first picture, aren’t they?

11ant22 Aug 2018 17:37

#41

Alex85 schrieb:
I completely disagree. In my opinion, 11-17cm (4-7 inches) of perforated Poroton is like cardboard; everything goes right through it.

My father lived for years in a gas concrete building, even on a busy road, and I myself had a factory hall with an office section, also made of gas concrete, both without any noise issues. The quality of this building material would have had to change drastically over the last forty years if it were no longer effective today, as is often mentioned here.

Regarding porous bricks, I am more inclined to agree—although I have no personal experience—but in this and other forums, the general consensus seems to be that apart from calcium silicate bricks, nothing really performs well.

Bauherr&-Frau schrieb:
It is also said that with calcium silicate bricks, the risk is high that the external thermal insulation composite system (ETICS) increases the sound transmission, making the calcium silicate bricks less effective.

I recall a forum post from a few weeks ago (although I don’t remember if it was here or in another forum) discussing precisely this issue: sound transmission through an entire multi-family building, with uncertainty whether it was transmitted via pipe shafts or through the ETICS.

https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/

ShawN4622 Aug 2018 18:02

#42

Hello everyone,

I just want to quickly join this topic (sorry for the off-topic)...

Do you think it is a good idea to build a small platform with Ytong blocks (195mm (7.7 inches) high, 1970mm (77.6 inches) long, and 874mm (34.4 inches) wide) that will be tiled and must be walkable?
(Otherwise, I only find information regarding wall tiles on aerated concrete...)

Thanks!

ᐅ Y-Tong (aerated concrete) – a quality building material? (Sound insulation!)

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