ᐅ Proton 42.5 unfilled or 36.6 filled?

Created on: 9 Oct 2021 10:13
K
Kati2022
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?
K
Kati2022
10 Oct 2021 10:06
Thank you for the feedback.

From what I’ve read here, we won’t be doing anything wrong with the 36cm (14 inch) filled brick and calcium silicate interior walls. I did some research yesterday and saw that the brick manufacturer offers filling with mineral wool and with wood wool (U-value for both 0.18). Are there any significant differences between these?
S
Snowy36
10 Oct 2021 11:45
Wood wool sounds odd when it comes to moisture... If you don’t care much about the disposal of your bricks, go with mineral wool; otherwise, there is also perlite...