Material mix without basement, plinth, moisture-resistant fabric insulation

Hi,

if the top edge of the concrete slab is at ground level, you don’t have to build a base. That can be worked out in detail. Your architect should think about it.
It is important that the wooden components are protected from moisture. And that is done by arranging a base (not built of masonry, but integrated into the façade).
Otherwise, you can safely place your stud frame on the slab. It is not standing in the "dirt".

Regards

Hello,

I was able to talk to my planner/structural engineer again today. He said that on the foundation slab, a row (25cm) of formwork blocks is made (the doors, of course, are left out). The formwork blocks are then filled with concrete and receive appropriate insulation and sealing on the outside (I think it was 12cm XPS).
On this base, the wooden stud frame (with the wood fiberboard on the outside) is then placed flush. This way, you can plaster it all in one piece and the base is practically not visible from the outside.
I tried to draw it as I understood it:


What do you think about it?

Thanks!

Regards, Mike

Hi,

since this is a conceptual sketch, I will not go into details.

I find the solution only suboptimal. In principle, you can do it this way, but you don't have to.
What would be the objection to placing the framework directly on the base plate?

Of course... this is really just a conceptual sketch and of course not to scale, etc.
According to the structural engineer (as mentioned above), the problem is that the stud frame can become wet/damp, for example, due to standing moisture (or snow, etc.). The wall construction is vapor permeable and from the outside, after the plaster, there is a wood fiber insulation board and then the stud frame with cellulose... so all materials that are not exactly 'waterproof'...
And as mentioned, there should even be a guideline or regulation that the stud frame must have a minimum distance of 15 cm (or 30 cm - I don't know) from the top edge of the floor (does anyone know this??).

I just googled a bit again, but since you immediately get a warning here without prior notice for linking (even to independent, ad-free sites), I'd better leave it at that... Here is a quote that deals only with the topic of 'splash water':

Due to the proximity to the ground, rainwater splashing back from the soil also endangers the base area. Therefore, sufficient distance of the wooden parts from the ground must be ensured. Reliable protection is provided by a distance of the lowest wooden parts of 30 cm above the ground.

There is similar information regarding the topic of 'standing water' (i.e., puddles) or snow, etc. Unfortunately, there are very few technical instructions on how to manage the problem. One measure is, for example, the installation of a permeable strip (essentially a 'moat' with gravel around the house). However, I am more interested in the technical solution directly on the building structure.

According to the structural engineer (as mentioned above), the frame, for example, can become wet/damp if exposed to standing moisture (or snow, etc.).

not if the sealing is properly planned and executed. As I said, you can do it with the base if that makes you feel more comfortable. But you don’t have to. You can protect the construction from the outside.

And as I said, there is supposed to be a guideline or regulation that the frame must have a minimum distance of 15cm (or 30cm – I don’t know) from the top edge of the ground (does anyone know??).

Your planner/structural engineer should know that.