ᐅ Soil report for a 140 sqm bungalow – additional costs for waterproof concrete?
Created on: 8 Sep 2022 10:41
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EinmalimLeben
Hello!
This is my first time writing in the forum, and I’ll briefly introduce what we are planning/building:
- Bungalow with solid construction, 140 sqm (1,507 sq ft), without a basement, developer-built, building site in Lower Saxony, contract already signed and planned with the architect from the construction company.
Currently, we are preparing the building permit/planning permission application and have the soil report available. Therefore, we need waterproof concrete (WU concrete), and our developer estimates about 130 euros per sqm (square meter) of the house’s external dimensions; the final price can only be calculated after the structural engineering and material selection phase.
My questions: is there an alternative to WU concrete? Is this the same as a “white tank” (waterproof concrete structure)? I thought this wouldn’t be necessary since we are building without a basement? Is the cost estimate realistic, or what are your calculations? Since we are building to KfW40 energy standards, insulation is required—what additional costs should we expect approximately?
Thanks for your help!
This is my first time writing in the forum, and I’ll briefly introduce what we are planning/building:
- Bungalow with solid construction, 140 sqm (1,507 sq ft), without a basement, developer-built, building site in Lower Saxony, contract already signed and planned with the architect from the construction company.
Currently, we are preparing the building permit/planning permission application and have the soil report available. Therefore, we need waterproof concrete (WU concrete), and our developer estimates about 130 euros per sqm (square meter) of the house’s external dimensions; the final price can only be calculated after the structural engineering and material selection phase.
My questions: is there an alternative to WU concrete? Is this the same as a “white tank” (waterproof concrete structure)? I thought this wouldn’t be necessary since we are building without a basement? Is the cost estimate realistic, or what are your calculations? Since we are building to KfW40 energy standards, insulation is required—what additional costs should we expect approximately?
Thanks for your help!
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EinmalimLeben26 Sep 2022 15:38I just received the revision, which will also be sent to the construction company. I quickly redacted everything, so it doesn’t look nice, but the content is what matters. 😉
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Bauen-in-Brand22 Feb 2023 07:46Hello, I wanted to ask how you solved the issue with the foundation slab. We are currently facing the same dilemma regarding the huge additional cost from Eco for the waterproof concrete slab (same water permeability class as yours). We were told they won’t install a drainage system; we have to use the waterproof concrete. They are not considering any other sealing options either...
Best regards
Best regards
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EinmalimLeben22 Feb 2023 14:57It was accepted in our case. However, we first spoke with the geotechnical engineer, and he amended the report accordingly. Hopefully, this will work for you as well.