Structural shell / Structural shell cost calculation - How does it calculate?

...and everyone says something different...

That’s just what the manufacturer says. Unfortunately, they are too far away to give you a guarantee. In other words, you would need to have a general contractor familiar with the system who can basically give you that in writing. Because the manufacturer also says

provided the structural engineering and thermal insulation allow it

Who is doing the thermal calculation and structural engineering?

but currently I can’t imagine how it could be done differently in the attic...
if you want to get from the attic to the bathroom below, you would have to go 2 m in the ceiling towards the south and then 1 m towards the east from there... I don’t think that will work...

Exactly: form follows function. In other words, if planned properly, the downpipes would be in the internally located corners. One would design the room layout accordingly. Not everything that works in CAD functions the same in reality.

do the factory planning together with a local architect

Architect: I have someone who understands SketchUp (my software). He takes my model and transfers it into CAD

That’s how I have done it so far. I found a building engineer authorized to submit plans who gave me the plans in pure form for little money

So, what is it now?

Hello,

- the draftsman made the plans for the building application. But he is too far away from us to provide meaningful ongoing support. I would like to have a local civil engineer/architect/expert for service phase 5+

- I have someone for the structural engineering, also for the heat calculation

- the wastewater pipes go into the walls. provisions will be made for inspection
- only the ventilation is unclear. In the bathroom of the small apartment, it would end up in our living room...

Regards, Alex

Feedback on the topic of encasing from the manufacturer:

There is no reason why the HT pipes contained in the concrete blocks should not be concreted in. They are indestructible and either inside the house or immediately in front of it, there is an inspection shaft so that one can access the pipes in case of a possible pipe blockage.

Not having concrete there would be bad for the statics and sound insulation. Furthermore, anyone who knows this could pierce through with a concrete rod or similar. The same applies, by the way, to the manufacturers who, for cost reasons, are reintroducing the styrofoam ribs on the blocks...

Regards, Alex

Not having concrete there would be bad for the structural integrity and soundproofing.

Correct, no one claimed not to have concrete there.

There is no reason why the HT pipes contained in the shuttering blocks should not be concreted in.

For thermal and structural reasons, 100 mm pipes simply do not belong in an exterior wall; whether they are plastered over, concreted in, or whatever is done around them.

I wish you much success with your project.

For thermal and statistical reasons, 100mm pipes simply do not belong in an exterior wall; whether they are plastered over, encased in concrete, or whatever else is done around them.

Our architect, structural engineer, as well as the shell builder simply refused to place the downpipes in the exterior wall. So there was a boxing...