ᐅ KfW 55 Single-Family Home – Brick or Aerated Concrete?

Created on: 23 Jun 2020 08:34
E
exto1791
E
exto1791
23 Jun 2020 08:34
Hello everyone,

We are currently still comparing different construction companies:

- One company builds exclusively with Liapor.
- One company builds exclusively with bricks.
- One company builds with Ytong – the additional cost for bricks is 5,000€.

We are building a KfW55 single-family house with an air-to-water heat pump and a central ventilation system.

I am aware of the pros and cons of each building material, but I wanted to hear your opinions here, possibly also in connection with the ventilation system.

The company that uses Liapor is by far the most expensive, partly due to the building material. However, I really don’t see any added value that would justify the sometimes up to 10,000€ surcharge.

Right now, we are actually considering building with Ytong. We favor a company that uses Ytong as standard; as mentioned, the surcharge for bricks is 5,000€.

We prefer bricks, but the real question is: why? Will I even notice any difference afterward?

My cousin has lived in his Ytong house for four years and has never complained about sound insulation...

What are your thoughts?
P
parcus
23 Jun 2020 09:52
The added value is likely related to the wall thickness, which the air-to-water heat pump may compensate for given the rather poor building envelope.
So, if the offered masonry thicknesses are the same, the lambda values should not be that significant. However, this should already be specified by the building permit / planning permission.

The building physics for brick are different because it is a composite material.
11ant23 Jun 2020 16:02
exto1791 schrieb:

We are currently considering building with Ytong. We prefer a construction company that uses Ytong as their standard material; the additional cost mentioned above is around 5,000.

The small surcharge suggests that quite a few of their clients choose this option. If you are one of four clients who select it and believe it to be better, go for it; however, if you are one of twenty clients and the other 95% opt for the alternative building material, then it might be wiser for you to do the same.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
E
exto1791
25 Jun 2020 07:59
A construction company said yesterday that Ytong might not be the best choice in an earthquake-prone area. What do you think about that? Is there any truth to it?
P
parcus
25 Jun 2020 08:17
And you think an engineer will answer you here now???
E
exto1791
25 Jun 2020 08:26
Perhaps someone else is also building in an earthquake zone and is asking the same question or has information from a construction company?