Saving by cantilevering the ground floor over the basement?

  • Erstellt am 2015-09-29 16:31:09

GWeber

2015-10-02 18:02:57
  • #1
Thank you very much for the answers.

It makes sense to me that when there is a cantilever of 3 m, it somehow has to/should be supported. In our case, however, it would have been more like 1 to 1.50 m. The first floor will also cantilever that much on one side without being supported.

But it is probably true that it is ultimately almost a zero-sum game, and therefore one will almost always decide on the larger basement. A pity. Saving a bit would still be necessary for us.
 

Sebastian79

2015-10-02 18:12:07
  • #2
With us it is 1.50m and it had to be supported

Both at the back (cantilevered) and at the front (upper floor cantilevered).
 

merlin83

2015-10-02 23:18:03
  • #3
We currently also have approximately a 2/3 basement (insulated and about 96 sqm of floor space in the basement) with about 140 sqm of ground floor area. The building site is fairly level - a maximum slope of 80 cm over 18.5 meters. I was also skeptical about whether I would save with the partial basement. Especially because the prevailing opinion on the internet is about structural problems and no cost savings.

Our architect says at least EUR 20,000 cost savings compared to a full basement - rather more. He has built at least 60 residential houses in his career (probably more). We may also include a full basement in the tender and see how much it actually costs.
 

GWeber

2015-10-05 20:48:23
  • #4


Oh. What kind of ground do you have? Rock?

For "normal soils," the argument is roughly this: working space plus slope = 2 to 3 meters around the basement walls the ground is disturbed. What rests there either has different settlement properties than the soil beneath the basement or the foundation is elaborate. Therefore, you might as well make the basement larger and get correspondingly more space for a small additional cost.
 

SirSydom

2015-10-06 01:09:53
  • #5
The savings are not only in the shell construction/excavation but also in the equipment of the basement rooms.

Leave out the screed, plaster, electrical installation, [Lichtschächte], interior doors and you save a lot of money - and still have reserves.

I am building without a basement. But I have enough land for a second house in the garden.
 

Sebastian79

2015-10-06 07:56:44
  • #6
What peanuts are at 1 to 1.5m cantilever...

Nice that your plot is so big, but I prefer to have my rooms in the house rather than in my imaginary second house in the garden
 

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