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What impact is such a small vertical milling supposed to have on the statics? One of our downpipes is also planned in the exterior wall. This was explicitly requested by the heating engineer.

I probably inferred too quickly from our 17 cm masonry Because it was like that for us. Sorry.

I probably drew conclusions too quickly from our 17 cm masonry Because that's how it was with us. Sorry.

Well, I wouldn't do it there either

...Photos would be nice. Masonry for us is 36.5cm brick

Hello Zaba12,

I have a photo. Here you can see the recess for a ventilation duct. We have such recesses from the basement to the upper floor. They were cut precisely into the stone (aerated concrete, 42.5 cm) before the stone was even laid.

Best regards

Axel

Such a milling is a matter for the structural engineer, but not impossible. With monolithic masonry, it also depends on the depth, because of course a thermal bridge is created and condensation can occur inside the pipe. This would then need to be insulated separately. We had such notes in an earlier version of the ventilation concept, but nowadays nothing runs in exterior walls anymore. The bathtub on the upper floor drains through a downpipe in a load-bearing wall (175mm calcium silicate brick) on the ground floor – the structural engineer has approved it.

Oh holy. This has to be done differently. This is not only about statics but also about the U-value of the exterior walls.

Hello Zaba12,

I have a photo. Here you can see the recess for a duct of the ventilation system. We have such recesses from the basement up to the upper floor. They were cut precisely into the stone (aerated concrete, 42.5 cm) before the stone was even laid.

Best regards

Axel