Proton 42.5 unfilled or 36.6 filled?

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

Hello everyone,
At first, we planned to build with Ytong. After a conversation with our architect and the energy consultant, we are now leaning more towards the Poroton brick.
The house is supposed to achieve min Eff. 55EE. We definitely want to build without WVDS.
Now we have 2 types of bricks to choose from. Both achieve a U-value of 0.18. In terms of price, they are also almost on the same level (price difference in the mid 3-digit range).
1. S8 in 42.5
2. MZ70 in 36.5 (with mineral wool)

I have read a lot here about the pros and cons of the bricks. Now, however, I want to compare exactly these 2 types.
On one hand, I wanted a monolithic wall (filled brick is after all not monolithic), on the other hand, I would prefer a thinner brick with the same U-value.
Are the ribs in the S8 brick really so delicate that drilling is only possible with difficulty?
Are there any builders here who have built with one of these bricks?

Hi,
definitely the filled brick. An unfilled S8 brick has about the same sound insulation as a tent!

Best regards,

Andreas

Now we have 2 types of bricks to choose from. Both achieve a U-value of 0.18. They are also priced at almost the same level (price difference in the mid three-digit range).

Plus changes in structural engineering and heating load calculation.

1. S8 in 42.5 2. MZ70 in 36.5 (with mineral wool) I have read a lot about the advantages/disadvantages of the bricks here. Now I want to compare exactly these 2 types. On one hand, I wanted a monolithic wall (filled brick is not monolithic after all),

Well, monolithic in the sense of solid brick would also have to be a good deal thicker.

I still think gegüllt is great! Definitely ecological. We used 36.5 aerated concrete. Everyone says "poor soundproofing." Sure, we hear the neighbor's circular saw and especially the helicopters that fly 20m above our house daily to the university hospital. But we hardly hear the directly neighboring kindergarten. You shouldn't overestimate soundproofing either.

Yes, then the question would be how much less the neighbor would hear the helicopter with filled bricks … of course, that cannot be answered …. But since 3 dB is a 50% reduction, you can look at the values … I would therefore take the filled ones for the next house.

Including changes in static and heating load calculation.

That was not calculated at all yet. We are still in the planning phase.

Filled I still find great!
Definitely ecological.

:cool::cool::cool:

I would therefore take the filled ones for
the next house.

So, you are currently living in a house made of unfilled bricks?
My sister has Wienerberger 36.5 unfilled (I don’t know exactly which one, probably the T10) and it is very loud inside the house. However, I think that's because she has many smooth surfaces (large windows without curtains, high-gloss tiles everywhere, large open spaces...).

We plan the interior walls from sand-lime brick – because of sound insulation (leftover from the Ytong planning). Should we stick to that or switch to bricks? I read somewhere that you shouldn’t combine red/white. My planner says that as long as the load-bearing walls remain made of red brick, everything is fine.