ᐅ Which type of stone is best for exterior walls?

Hello everyone,

We are currently planning our single-family home in the Stuttgart area. Apart from the exterior wall, most details are already decided. The house will be built in a quiet residential area with underfloor heating and gas.

I have received three options:

1. 17.5 cm (7 inches) brick + external thermal insulation composite system (ETICS) (standard wall) with no extra cost.
2. Ytong 36.5 cm (14 inches) block – if I may call it that – with a thermal transmittance of 0.23 W/m²K – additional cost: €8,900.
3. Poroton with 0.19 W/m²K – additional cost: €12,200.

I don’t really want to insulate my house with expanded polystyrene (EPS). I’m not a fan of that. Now I’m hesitating between options 2 and 3. What would you recommend?

Thank you very much.

I would recommend choosing the option you feel most comfortable with after thorough research, quite simply. Read a bit more here and you will be able to decide without relying on the subjectivity of others. You can build with both aerated concrete and clay blocks, so what exactly do you want us to recommend?

Thank you first of all.
It is really not an easy decision. Both aerated concrete and clay blocks have their advantages and disadvantages. At the moment, I am leaning towards clay blocks. With brick, there is simply many years of experience.

Aerated concrete has been around for almost 100 years...

And I wouldn’t exactly consider Poroton to be a brick.

The fact remains: Good houses can be built with both.

Thank you. It remains a difficult decision. Do those who have a pure aerated concrete or porous clay brick construction also have a ventilation system installed? I would actually prefer to avoid that as well.

thomas_neo schrieb:

So far, I have received 3 options:

You can be glad about that; having more choices is better.

thomas_neo schrieb:

1. 17.5 cm (7 inches) brick + ETICS (standard wall) no extra cost.
2. Ytong 36.5 cm (14 inches) block – if that’s the right term – with 0.23 W/m²K – additional cost: €8,900
3. Poroton with 0.19 W/m²K – additional cost: €12,200

Actually, I don’t want to wrap my house in polystyrene. I’m not a fan of that. Now I’m torn between options 2 and 3. What would you recommend?

No one can advise you for or against because there is no single “best” block suitable for every construction project. Ultimately, the decision depends on your gut feeling and, in the end, on the seismic zone and structural engineer’s assessment.

Why do you have three wall construction options available? Are you building through an architect?

Regards, Bauexperte