Danton
2009-05-19 17:57:21
- #1
Hello Melanie,
The additional costs for a "white tub" depend on various factors: size (floor area, story or reinforced concrete wall height) of the basement, simple floor plan or complex floor plan, etc. But for a normal single-family house, the additional costs compared to a basement made of masonry are estimated to be between €5,000 and €10,000.
If the groundwater is about 0.75m below the top edge of the soil, special attention must of course be paid to the careful execution of the tub. Any exterior basement stairs must obviously be included in the tub as well. With the light wells in front of the basement windows, tightness must also be urgently ensured, otherwise the groundwater can flow into the basement windows. If necessary, these must also be constructed from WU concrete. The drainage must not end here as usual, but must be discharged through a separate waterproof pipe.
I have already had a similar case at a holiday home at Alfsee. There, the groundwater sometimes reached just below the lawn.
With such groundwater conditions, I would consider whether to let the house protrude far enough out of the soil or whether to do without the basement and instead build a larger storage room at the garage/carport, provided the plot size allows this. If built without a basement, the foundations should be adequately dimensioned for the following reason. If the groundwater level should temporarily or permanently drop at some point, increased settling and cracking could otherwise occur due to the missing counterpressure.
I hope that I was able to help you a little with my explanations.
The additional costs for a "white tub" depend on various factors: size (floor area, story or reinforced concrete wall height) of the basement, simple floor plan or complex floor plan, etc. But for a normal single-family house, the additional costs compared to a basement made of masonry are estimated to be between €5,000 and €10,000.
If the groundwater is about 0.75m below the top edge of the soil, special attention must of course be paid to the careful execution of the tub. Any exterior basement stairs must obviously be included in the tub as well. With the light wells in front of the basement windows, tightness must also be urgently ensured, otherwise the groundwater can flow into the basement windows. If necessary, these must also be constructed from WU concrete. The drainage must not end here as usual, but must be discharged through a separate waterproof pipe.
I have already had a similar case at a holiday home at Alfsee. There, the groundwater sometimes reached just below the lawn.
With such groundwater conditions, I would consider whether to let the house protrude far enough out of the soil or whether to do without the basement and instead build a larger storage room at the garage/carport, provided the plot size allows this. If built without a basement, the foundations should be adequately dimensioned for the following reason. If the groundwater level should temporarily or permanently drop at some point, increased settling and cracking could otherwise occur due to the missing counterpressure.
I hope that I was able to help you a little with my explanations.