Paving the terrace for a new construction of a "low-built" single-family house

Maybe you could drain/collect your rainwater on your property? Then you can lay the rain pipes much deeper. Possibly have a huge cistern installed for collecting. Of course, that costs… Our rainwater, for example, does not go into the public network at all. It infiltrates through a soakaway on our property.

Now to the question: Is there no alternative to "paving"?

Good point, there are also people with seats on gravel/pebbles. That should also work with 10cm coverage if necessary.

Hello,

so that the architect of the general contractor had suggested to me to "bury" this 30 cm. Which was also done.

*argh* ... why only.... but the child has now fallen into the well.

That is absolutely not acceptable. You have standing water at the house, make sure it goes away, and not "soon" but today! I hope you built with a white tank here, otherwise you have a real problem. This is a house, not a boat! And if it is a timber frame house, then hat off for prayer...

The rainwater pipes don't work at all like that, forget it. You will either need a soakaway or a deep collection shaft with a pump. It just costs. But there is no other way.

Questions:

Is there a separate sewage system for rainwater and wastewater? If not, why do you not go directly into the wastewater pipes?
How do you reach the wastewater sewer? Is it so much deeper? There should be the same problem, right?
Where is the drainage plan? It must exist!
Why do you lay the expensive KG2000 pipes for rainwater, the cheap ones would have done as well....

Best regards,

Andreas

First of all, thank you very much for your answers!

First, the rough answers :)

[*]I will take more pictures over the weekend.
[*]The house is made of sand-lime brick (not wood) and (unfortunately) has no basement underneath.
[*]Wastewater and rainwater are separated.
[*]The landscaper was commissioned for the drainage at the end of December. But it will probably take a few more weeks...
[*]The photos I took were taken from the office and the wide living room window.
[*]A TÜV inspector is part of the contract with 6 visits or similar.

I guess I am partly to blame because I co-signed the building application, but shouldn't something like that have been noticed by the architect of our general contractor? He was in contact with the city.

@ hmm I would have to look for further detailed drawings... @ Oh that sounds like you have to go up two steps to get onto a paved terrace... but the gravel would be an alternative :) @ Yes exactly, the pipes connected to the downspouts of the gutter are the green pipes. @ hmm is that in the soil report regarding the ground? The following was stated in the soil report for the city (4 years ago):

The building ground initially consists of an almost continuously present topsoil layer with a locally underlying construction waste-mixed fill. As natural soils, alternating sequences of sandy to heavily sandy silts and silty sands or gravels generally follow. Only locally were layers with higher organic content detected. The underlying building ground is sufficiently load-bearing for the planned single-family house construction from a depth of approximately 0.6 m to 2.2 m below the surface. During the conducted ground investigations, groundwater was detected from a depth of approximately 1.4 m below the surface.

As far as I know, the ground was raised by one meter with soil enriched with lime or something load-bearing. This is what my soil investigation says:

Below a 0.9 m thick fill horizon made of stabilized silt, there are sediment deposits up to at least 4.0 m depth (final depth of the borings). Petrographically, these appear down to at least 2.0 m depth as heavily sandy silts (glacial clay) of stiff consistency. Without a clear layer boundary, non-cohesive sedimentary sands follow in the form of silty or gravelly sands. The sedimentary sands are medium dense.

@ It had to be quick, we only received approval for this plot a year ago and building had to start within 2 years...

@ Yes you are right, that is an idea that was also suggested to us by the landscape gardener.

... It had to be done quickly, we had only received approval for this plot a year ago and construction had to start within 2 years...

What is quick about that? From the decision to build to moving in with us was 1.5 years, and a construction period of about 1 year is "normal" What kind of ETICS is in front of the sand-lime brick? But no matter what it is, it definitely shouldn’t be standing in water. Make sure you get a pump and install drainage. I would take that very seriously. What are the heights of the connections for rainwater and sewage? (if necessary, remove the manhole cover and measure...)