ᐅ A slab foundation is not possible due to poor soil conditions. What about a basement?
Created on: 5 Jun 2013 16:07
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PipilottaP
Pipilotta5 Jun 2013 16:07Hi Forum,
we are currently finalizing the detailed planning of our house. For financial reasons, we want to build without a basement, and the concept fits this approach. However, today we heard from our future neighbors (plot opposite) that the soil report showed a concrete slab is not possible because the soil is too poor, and a basement is absolutely necessary. I have never heard of something like this before. Is this possible? Or is someone just trying to sell a basement?
Best regards,
Martin
we are currently finalizing the detailed planning of our house. For financial reasons, we want to build without a basement, and the concept fits this approach. However, today we heard from our future neighbors (plot opposite) that the soil report showed a concrete slab is not possible because the soil is too poor, and a basement is absolutely necessary. I have never heard of something like this before. Is this possible? Or is someone just trying to sell a basement?
Best regards,
Martin
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Bauexperte5 Jun 2013 16:18Hello Martin,
It is more likely that the neighbors would have had to carry out an expensive soil replacement. The cost of a basement becomes more reasonable when there is maybe only about 10,000 to 15,000 euros difference involved.
Best regards, Bauexperte
Pipilotta schrieb:If I’m not mistaken, the basement floor slab is also not supported on open ground.
Today we heard from our future neighbors (plot across the street) that the soil report showed a slab foundation is not possible because the soil is too poor, and a basement is absolutely necessary. I have never heard of something like this. Could this be true? Or is someone just trying to sell a basement?
It is more likely that the neighbors would have had to carry out an expensive soil replacement. The cost of a basement becomes more reasonable when there is maybe only about 10,000 to 15,000 euros difference involved.
Best regards, Bauexperte
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Pipilotta5 Jun 2013 16:27Hello building expert,
All right, that's what I thought as well. Do you have any experience with what something like that might cost in the worst case? For a slab foundation for a KFW55 house of about 9x12m (29.5x39.4 ft)? Just roughly... Although the ground would also need to be replaced for a basement, right? I mean, if the difference is only around 10-15,000 euros and I can then possibly make the house a bit smaller because I can move the utility room and office to the basement, then that is actually something to consider. Well, we’ll see!
Thank you very much!
All right, that's what I thought as well. Do you have any experience with what something like that might cost in the worst case? For a slab foundation for a KFW55 house of about 9x12m (29.5x39.4 ft)? Just roughly... Although the ground would also need to be replaced for a basement, right? I mean, if the difference is only around 10-15,000 euros and I can then possibly make the house a bit smaller because I can move the utility room and office to the basement, then that is actually something to consider. Well, we’ll see!
Thank you very much!
We need to incorporate so-called “schroppen” into the soil to reinforce the ground. Up to about 1.5 meters (5 feet) deep, the soil is quite unstable; below that, it looks much better.
We have a quote to reinforce the soil for just under €10,000 (including excavation and removal). A basement would have cost around €30,000 for a waterproof basement without earthworks (rough estimate: €15,000). So the decision was easy.
We are building a slab foundation measuring 9 x 11 meters (29.5 x 36 feet).
A soil report is still worthwhile, as the soil expert will tell you which measures you should take. Then you can get specific quotes from the contractors.
We have a quote to reinforce the soil for just under €10,000 (including excavation and removal). A basement would have cost around €30,000 for a waterproof basement without earthworks (rough estimate: €15,000). So the decision was easy.
We are building a slab foundation measuring 9 x 11 meters (29.5 x 36 feet).
A soil report is still worthwhile, as the soil expert will tell you which measures you should take. Then you can get specific quotes from the contractors.
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