Is the old soil report still usable?

  • Erstellt am 2022-09-02 21:14:39

Mokus95

2022-09-02 21:14:39
  • #1
Hello, I had a soil survey conducted 7 years ago (2x 8m 1x 6m 1x 4m) on our property. Now the construction company wants a new survey because the DIN has changed and the groundwater level has risen. Does that make sense? The soil has not changed after all. To be honest, I feel this is just a money-making scheme.
 

ypg

2022-09-02 21:32:16
  • #2
Why? The construction company doesn't make any money from that. In my opinion, it must be correct, see warranty.
 

Cronos86

2022-09-05 15:12:22
  • #3
Hi,
I guess this concerns DIN 18533-1 for building waterproofing (Abdichtung von erdberührten Bauteilen von 2017).

It is about whether your house needs to be sealed against pressurized water or only against soil moisture.

This depends on
- the soil type (sand/gravel = permeable, clay/loam soil = less permeable)
- the water level (distance of the base slab to the groundwater)
- and thus also on your foundation (basement or slab) and the embedding depth

from these factors, the water impact on the building is determined.

The groundwater level can of course always change (in summer up to one meter lower than in autumn), so the waterproofing must be properly chosen.

In general, I would ask the soil expert if he can adapt the building waterproofing to the planning. That should not be too expensive. I also consider it pointless to conduct further borings.

You can post soil type, water level, and planned foundation.

Regards
 

xMisterDx

2022-09-06 20:20:56
  • #4


What should have changed in the ground conditions in 7 years?
 

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