ᐅ Proton 42.5 unfilled or 36.6 filled?

Sorry for the typo in the topic. Unfortunately, it cannot be corrected...

Hello everyone,
Initially, we planned to build with Ytong. After a discussion with our architect and energy consultant, we are now leaning more towards Poroton bricks.
The house should achieve at least Eff. 55EE. We definitely want to build without external thermal insulation (ETICS / cladding).
We now have two types of bricks to choose from. Both achieve a U-value of 0.18. The price difference is also almost negligible (difference in the mid three-digit range).
1. S8 in 42.5cm (17 inches)
2. MZ70 in 36.5cm (14 inches) with mineral wool insulation

I have read a lot about the pros and cons of these bricks here. Now I want to compare exactly these two types.
On one hand, I wanted a monolithic wall (a filled brick is not really monolithic), on the other hand, I would prefer a thinner brick with the same U-value.
Are the vertical reinforcements in the S8 brick really so delicate that drilling is difficult?
Are there any homeowners here who have built with either of these bricks?

Hello,
definitely go for the solid (filled) brick. An unfilled S8 brick provides about the same sound insulation as a tent!

Best regards,

Andreas

Kati.com schrieb:

We now have two types of bricks to choose from. Both achieve a U-value of 0.18. Their prices are also almost at the same level (price difference in the mid three-digit range).

This is excluding changes to static structural calculations and heating load calculations.

Kati.com schrieb:

1. S8 with 42.5cm (17 inches)
2. MZ70 with 36.5cm (14 inches) (with mineral wool)
I have read a lot about the advantages and disadvantages of these types of bricks. Now I want to compare exactly these two.
On the one hand, I wanted a monolithic wall (a filled brick is not really monolithic),

Well, truly monolithic in the sense of solid brick would also have to be considerably thicker.

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I still think poured concrete is great!
Definitely ecological.
We used 36.5cm (14.4 inches) aerated concrete. Everyone also says "poor sound insulation."
Sure, we hear the neighbor’s circular saw and especially the helicopters that fly daily about 20m (65 feet) above our house on their way to the university hospital.
But we hardly hear the kindergarten right next door.
You shouldn’t overestimate sound insulation either.

Then the question would be how much less the neighbor would hear the helicopter with filled bricks… of course, this cannot be answered precisely… but since 3 dB represent a 50% reduction, you can consider these values… I would therefore choose the filled ones for the next house.

11ant schrieb:

Plus changes to structural engineering and heating load calculations.

That hasn’t been calculated at all yet. We are still in the planning phase.

Tarnari schrieb:

I still think the filled bricks are great!
Definitely more ecological.

😎 😎 😎

Snowy36 schrieb:

That’s why I would choose the filled ones for the next house.

So, you’re currently living in a house built with unfilled bricks?
My sister has Wienerberger 36.5 unfilled bricks (not sure exactly which type, probably T10) and it’s very noisy inside the house. But I think that’s because there are many smooth surfaces (large windows without curtains, glossy tiles everywhere, large open spaces...).

We are planning to use sand-lime bricks for the interior walls because of sound insulation (a leftover idea from the Ytong planning). Should we stick with that or switch to clay bricks? I’ve read somewhere that you shouldn’t combine red and white bricks. My architect says that as long as the load-bearing walls are made of red bricks, everything is fine.