Hello everyone,
this is about a single-family house project with a basement (solid construction). During the soil test, groundwater was found at a depth of 1.30 meters (4 feet 3 inches) – now our builder says the construction could cost €200,000 more due to the need for a waterproof concrete shell (“white tank”), pumping, sheet piling, etc. Can anyone share their experience with this? Is groundwater really such a costly issue? We have a meeting with our builder on Tuesday, but we would be interested in hearing your experiences beforehand.
Best regards
this is about a single-family house project with a basement (solid construction). During the soil test, groundwater was found at a depth of 1.30 meters (4 feet 3 inches) – now our builder says the construction could cost €200,000 more due to the need for a waterproof concrete shell (“white tank”), pumping, sheet piling, etc. Can anyone share their experience with this? Is groundwater really such a costly issue? We have a meeting with our builder on Tuesday, but we would be interested in hearing your experiences beforehand.
Best regards
H
hanghaus202322 Jan 2023 13:13The waterproof concrete shell is probably the necessary solution. Whether extreme costs such as sheet piling, water management, etc., are required cannot be assessed here. That is what the geotechnical engineer states in their recommendation. Please share it here.
Without a basement is then the lesser evil.
Without a basement is then the lesser evil.
Welcome to the forum,
with a groundwater level of 1.3m (4.3 feet), I would not build a basement. The water level can rise higher in wet years,
then it will flow into the basement light wells, and basement windows are not submarine windows.
If the site is lower, it will flood faster.
Does the floor area ratio allow for a larger footprint, or are you already at the limit?
with a groundwater level of 1.3m (4.3 feet), I would not build a basement. The water level can rise higher in wet years,
then it will flow into the basement light wells, and basement windows are not submarine windows.
If the site is lower, it will flood faster.
Does the floor area ratio allow for a larger footprint, or are you already at the limit?
Nida35a schrieb:
Welcome to the forum,
with a groundwater level of 1.3m (4.3 ft), I wouldn’t recommend building a basement. The water table can rise higher in wet years,
which can cause water to enter the basement light wells, and basement windows are not designed to be watertight.
If your plot is lower, it will flood more quickly.
Does the floor area ratio allow for a larger footprint, or are you already at the limit? Unfortunately, we are already at the limit, and the allowed area is really small, 100m2 (1,076 sq ft).
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