Building a residential/hobby basement underground - What to consider?

  • Erstellt am 2018-01-03 10:43:35

Steven

2018-01-03 14:23:59
  • #1
Hello Webmaster-uk

I have been doing a similar project on my own for 2 years and am close to completion.
It’s called Klimakeller! Size approx. (external dimensions) 480cm x 430cm. I got 13 containers of 10m² each. That’s about 4,000 euros. For the pit, I concreted curbstones (100 x 25 x 5 cm) upright as edging and for the formwork of the floor slab. On the floor, I laid overlapping stud foil. The floor slab consists of fiber-reinforced WU concrete, 30 cm thick. The walls are made of 30 cm concrete formwork blocks. I laid the first row of these blocks flat on mortar. Then in the middle of each block a hole (d=14mm) and vertically 14mm reinforcing steel bars 1 meter long. 3 blocks stacked and each filled with concrete (1:3). Don’t forget to put an 8mm reinforcing steel bar horizontally in every row of blocks. This up to the top and also the vertical reinforcement to the top. Here applies: more is better. On top then a ring beam and now I am forming the ceiling. I do the reinforcement according to the structural engineer’s plan. Concrete about 30cm. For sealing: thick-layer bitumen, 5cm styrofoam (the rigid type) on top of that and stud foil again in front.
Between wall and curbstones I filled with filling gravel, between curbstone and soil RCL. Always compact well. I extended the curbstones to the top (after all over 3 meters).
I wouldn’t do it without approval. Such a cellar can be approved without problems. A structural engineer is a must.
I do it myself for fun. Hiring someone you cannot afford. But I think I will manage with 10,000 euros.
If you have questions, also gladly via PM.

Steven
 

ypg

2018-01-03 15:57:42
  • #2
Why actually underground? It’s much more complicated than a garden shed. I always have to think of stories like Kampusch when someone plans something underground.
 

Alex85

2018-01-03 16:12:26
  • #3
I also first thought of bunkers in the garden
 

ypg

2018-01-03 16:37:55
  • #4


...on top of that, you have living space across four floors. Isn’t there any room for a hobby? Considering the circumstances... sloped plot, drainage, etc... I wouldn’t dare get involved at all, because if you think about the implied price leading to a DIY project without steel, etc., it’s just unpleasant.

Anyway: it will never be a lounge room, so it won’t be approved...
 

Bieber0815

2018-01-03 17:19:42
  • #5
The note was just that you need a static calculation.

The costs do not correlate directly downwards with the area.

Regardless of floor-area ratio and such things? (Honest question, I have no idea about the approval aspects of this idea.)
 

Steven

2018-01-03 18:38:10
  • #6
Hello Bieber0815

in NRW, no distance areas apply to underground installations.

Steven
 

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