ᐅ Ytong vs. Aerated Concrete Blocks – Construction Manager Pushes for Ytong Due to Incorrect Order
Created on: 27 Sep 2023 19:10
S
Swoti
Hi everyone,
We are currently building our single-family house. The exterior walls are made of Hebel/Ytong 36.5cm (14.4 inches) aerated concrete. Originally, we planned to build all the interior walls with calcium silicate bricks. However, the builder pushed us to use aerated concrete for all the walls on the ground floor and only calcium silicate bricks on the upper floor where the bedrooms are located.
I wanted calcium silicate bricks mainly because of their high density and sound insulation properties, as I want good soundproofing between the bedrooms (3 girls).
Now the site manager clearly ordered Ytong, even though calcium silicate bricks are specified in the structural plan. Specifically, it states: KSL-P 12-1.60/DbM SFK12, raw density = 1.5 kg/dm³ (94 lb/ft³), compressive strength sigma0 = 1.80 MN/m² (261 psi), fk = 5.50 MN/m² (797 psi).
His mistake seems quite obvious. He now wants to sell the Ytong instead. He said that the PPF 0.5 Ytong actually has a higher density and provides better soundproofing than the calcium silicate bricks.
I’m not really familiar with this and would like to hear your opinions. Should I insist on using calcium silicate bricks?
Thanks.
We are currently building our single-family house. The exterior walls are made of Hebel/Ytong 36.5cm (14.4 inches) aerated concrete. Originally, we planned to build all the interior walls with calcium silicate bricks. However, the builder pushed us to use aerated concrete for all the walls on the ground floor and only calcium silicate bricks on the upper floor where the bedrooms are located.
I wanted calcium silicate bricks mainly because of their high density and sound insulation properties, as I want good soundproofing between the bedrooms (3 girls).
Now the site manager clearly ordered Ytong, even though calcium silicate bricks are specified in the structural plan. Specifically, it states: KSL-P 12-1.60/DbM SFK12, raw density = 1.5 kg/dm³ (94 lb/ft³), compressive strength sigma0 = 1.80 MN/m² (261 psi), fk = 5.50 MN/m² (797 psi).
His mistake seems quite obvious. He now wants to sell the Ytong instead. He said that the PPF 0.5 Ytong actually has a higher density and provides better soundproofing than the calcium silicate bricks.
I’m not really familiar with this and would like to hear your opinions. Should I insist on using calcium silicate bricks?
Thanks.
X
xMisterDx28 Sep 2023 13:58If I understand correctly, he wants to put heavy material on top of light material because according to the structural engineer, aerated concrete is planned for the ground floor?
The issue is that the walls on the upper floor are supposed to be made of sand-lime bricks, but currently only aerated concrete blocks are on-site.
If that’s what you wanted, then you should get exactly that. A few bricks shouldn’t be too hard to source during the current construction challenges, and he can use the aerated concrete on the next house.
I do find the argument about the girls interesting… are girls louder than boys? Especially since the subwoofer vibrates through the floor across the entire level.
The issue is that the walls on the upper floor are supposed to be made of sand-lime bricks, but currently only aerated concrete blocks are on-site.
If that’s what you wanted, then you should get exactly that. A few bricks shouldn’t be too hard to source during the current construction challenges, and he can use the aerated concrete on the next house.
I do find the argument about the girls interesting… are girls louder than boys? Especially since the subwoofer vibrates through the floor across the entire level.
We used sand-lime brick blocks plus external thermal insulation composite system (ETICS), and in direct comparison with friends who built purely with aerated concrete blocks (e.g., Ytong), the difference is quite noticeable. For us, sound only passes through doors and windows, but the walls are “solid.”
As already mentioned, the structural engineer did not choose this combination without reason, and I insist on what has been finalized. He can install the aerated concrete “special waste” somewhere else. ;-)
As already mentioned, the structural engineer did not choose this combination without reason, and I insist on what has been finalized. He can install the aerated concrete “special waste” somewhere else. ;-)
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