ᐅ Aerated concrete 42.5, thermal conductivity (lambda) 0.08 or 0.09 W/m·K

Two months ago, my mason said that the material costs are about the same. However, labor costs for calcium silicate bricks might be higher because they are more difficult to work with.

We only have 11.5cm (4.5 inches) Ytong blocks. It’s not a big issue, but you can definitely hear some noise. Well, in our case, the living room shares a corner with the bedroom. So, I have to be a bit considerate in the evening when the sound system is on and I’m watching an action movie. Now, I would probably choose calcium silicate bricks. We did the shell construction ourselves, and Ytong is simply more practical. It’s easier to handle than calcium silicate bricks.

So, I find our Poroton house, including the 11cm (5 inches) and 17cm (7 inches) interior walls, to be quite noisy...

If I were to build again: definitely no Poroton.

OK, thanks for the feedback regarding the interior walls.

To the thread starter @eddy8118
Our architect clearly advised against using filled Poroton blocks. They are not ideal in terms of installation and are difficult to work with because, despite covering the wall tops, they would always get wet. We will likely use an unfilled T8 block with a thickness of 36.5cm (14 inches).

Best regards! mini_g!

mini_g! schrieb:

OK, thanks for the feedback regarding the interior walls.

To the thread starter @eddy8118
Our architect clearly advised against using filled Poroton blocks. They are not ideal for construction and are difficult to work with since they will always get wet despite covering the wall tops. We will probably use an unfilled T8 block with a thickness of 36.5cm (14.4 inches).

Best regards! mini

Go ahead and make the mistake of using T8 blocks at 36.5cm (14.4 inches). Many have done so before you, and many will after you. When you build your second house, you will definitely choose a different block, guaranteed!

Bookstar schrieb:

Go ahead and make the mistake of using T8 with 36.5cm (14 inches). Many before you have done it, and many after you will too. By the time you build your second house, you will definitely choose a different brick, guaranteed!

Why is that a mistake?

Is there even an unfilled T8? When I search for "T8 bricks," I find a perlite-filled brick from the POROTON brand.

**Edit: if you’re talking about an 11cm (4.5 inches) or 18cm (7 inches) Poroton brick for interior walls, then it is obviously always unfilled (without perlite), right? So Poroton is just the brand.

Bookstar schrieb:

Go ahead and make the mistake of using T8 with 36.5cm (14 inches). Many before you have done it, and many will do the same after you. When you build your second house, you will definitely choose a different block, I promise!

So, you support aerated concrete for the exterior wall and sand-lime brick for the interior?

ludwig88sta schrieb:

Is there even an unfilled T8? When I search for "T8 brick," I only find a perlite-filled brick from the brand POROTON.

My mistake, confusing terminology. It’s an unfilled hollow brick that the local brickworks call Klimatherm PL8. Thermal conductivity 0.08.
That would then correspond to the Schlagmann Poroton Plan brick U8; I assume they are identical.

Best regards! mini