ᐅ White tank - Water exposure class W2.2-E

Created on: 2 Apr 2023 16:38
S
Swoti
Hello everyone,
our soil report arrived last week, and the earth appears to be of good quality and can be used for backfilling.
Unfortunately, a water exposure class W2.2-E was identified, and the developer therefore recommends a waterproof concrete basement structure ("white tank") due to the presence of groundwater pressure. The construction site is a vineyard with a gentle slope, and the winemaker who has worked the land for over 30 years told me in a conversation that he finds this surprising and does not understand where the groundwater pressure would come from.
Of course, we are both laypeople, so my question is: I have heard that soil experts nowadays tend to be cautious and assume a worst-case scenario. Would you install a waterproof concrete basement in this exposure class? What information would you need to be able to give advice on this?

Thank you!
K
k-man2021
4 Apr 2023 13:02
I can only confirm everything mentioned. We are also building on a slope, with a waterproof basement. Although we have forest instead of a vineyard on the hillside, there are no openings in the basement; it is a watertight concrete structure and additionally sealed on the outside.
X
xMisterDx
6 Apr 2023 23:07
Anything else would just follow the motto, "I don't need winter tires because I never drive when temperatures are below 4°C (39°F)."