How does it usually work with the basement if I decide to build a house, for example, with a prefabricated house provider?
Often, you can also order a basement from this provider, and it will likely be planned together with the house. However, this part of the business is usually outsourced anyway.
But if I want to have the basement built separately (for example, for cost reasons), how does the planning and construction process work? Does the prefabricated house provider still handle the planning to correctly position connections, stairs, windows, etc.? Or does the basement construction company take care of everything entirely?
Thanks
Often, you can also order a basement from this provider, and it will likely be planned together with the house. However, this part of the business is usually outsourced anyway.
But if I want to have the basement built separately (for example, for cost reasons), how does the planning and construction process work? Does the prefabricated house provider still handle the planning to correctly position connections, stairs, windows, etc.? Or does the basement construction company take care of everything entirely?
Thanks
D
Doc.Schnaggls7 May 2015 15:51Hello,
do you mean a basement that extends 50cm (20 inches) above ground level?
That’s also the case for us on three sides of the house – on the fourth side we have basement walls standing “exposed” from 50cm to 150cm (20 to 60 inches).
For us, this didn’t cause significant extra costs nor did it save money.
For the freestanding plinth, we skipped the dimpled membrane, but for that we need plaster.
The insulation is almost the same everywhere – only the part above ground is insulated with white Styrodur, while the part “hidden” underground is insulated with blue Styrodur.
Best regards,
Dirk
do you mean a basement that extends 50cm (20 inches) above ground level?
That’s also the case for us on three sides of the house – on the fourth side we have basement walls standing “exposed” from 50cm to 150cm (20 to 60 inches).
For us, this didn’t cause significant extra costs nor did it save money.
For the freestanding plinth, we skipped the dimpled membrane, but for that we need plaster.
The insulation is almost the same everywhere – only the part above ground is insulated with white Styrodur, while the part “hidden” underground is insulated with blue Styrodur.
Best regards,
Dirk
Bautraum20157 May 2015 16:06Yes, exactly. We want to bring light into the basement through the windows and also avoid the need for pumping out groundwater during excavation.
Doesn't this save about 50cm (20 inches) of excavation? You just have to build a small entrance staircase, and the terrace could be raised using the excavated material...
Doesn't this save about 50cm (20 inches) of excavation? You just have to build a small entrance staircase, and the terrace could be raised using the excavated material...
D
Doc.Schnaggls8 May 2015 08:34Yes, you will have 50cm (20 inches) less excavation, that is correct.
Do you already have a soil report? It usually includes recommendations for the foundation – depending on this, you might need to add a gravel layer of varying thickness under the basement (and therefore excavate to the appropriate depth) to protect against groundwater.
The soil report should also indicate whether you can use the excavated soil to build up the terrace.
Not all soil types are suitable for compaction and therefore for use as a terrace subbase.
Do you already have a soil report? It usually includes recommendations for the foundation – depending on this, you might need to add a gravel layer of varying thickness under the basement (and therefore excavate to the appropriate depth) to protect against groundwater.
The soil report should also indicate whether you can use the excavated soil to build up the terrace.
Not all soil types are suitable for compaction and therefore for use as a terrace subbase.
S
Sebastian799 May 2015 12:01Gravel does not protect against groundwater 😉
Why do you need a waterproof concrete shell ("white tank") at a groundwater depth of 5m (16 feet)? You only need it in cases of hydrostatic pressure or stagnant groundwater.
Why do you need a waterproof concrete shell ("white tank") at a groundwater depth of 5m (16 feet)? You only need it in cases of hydrostatic pressure or stagnant groundwater.
Bautraum20159 May 2015 14:33We have not had a soil survey done yet, and we’re not sure if it’s worth it. The neighbors on both sides have soil classified as class 3, with no bedrock or anything similar at our latitude. It’s slightly clayey, but that’s about it. Since the rainy seasons have become more extreme in recent years, many people in the village have experienced groundwater in their basements without any waterproofing. By now, we have hydrostatic pressure after prolonged rain, so we are planning a waterproof concrete tank (“white tank”). We are also increasingly considering a raised basement, since we don’t want to use the basement just for storage, and natural light through windows is a strong argument for us. The neighbor on the right built a raised basement, protruding about 70cm (28 inches) above ground level. Maybe I should talk to him sometime.
D
Doc.Schnaggls10 May 2015 10:49Lexmaul79 schrieb:
Gravel does not protect against groundwater 😉That's correct, I had expressed myself incorrectly there.
Thank you for the clarification!
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