Drainage covered only on one side by fleece

  • Erstellt am 2019-04-08 20:34:25

LuckyDuke

2019-04-08 20:34:25
  • #1
Hello dear forum members,

today I took a closer look at the drainage work on our construction site and became somewhat skeptical.

Until now, I thought that the drainage pipe must be surrounded all around by gravel, which in turn must be enclosed by a fleece. On our construction site, the drainage pipe was indeed laid on gravel, but the fleece was only laid on top. Furthermore, the amount of gravel used seems very small to me.

We have a clayey soil, which is why I actually thought that significantly more gravel had to be filled in. Moreover, clay soil is known to be difficult to compact or not compactable at all, so you actually shouldn’t use it for backfilling, right?

So the fleece is just unrolled directly from the roll and laid only on top of the gravel and was nailed to the dimpled membrane (which has a fleece on it from the factory). As I said, I thought the fleece must completely enclose the gravel and the pipe like a kind of sack.

Thank you and regards

 

Zaba12

2019-04-08 20:43:43
  • #2
Put differently, is your basement built with masonry so that you even need drainage?
 

LuckyDuke

2019-04-09 06:49:59
  • #3
So first of all, that was not my question at all. Regardless of the circumstances, I want to know how to do it correctly. It is paid for and the work has started as you can see. So your counter-question doesn't help me. And no, we have a white tank but it is on a slope and the ground consists almost entirely of silt, which is why the water running down must be drained cleanly. This also follows from a recommendation of the soil expert.
 

hstkai

2019-04-09 10:34:21
  • #4
It's a mess, according to DIN the drainage pipe including the gravel packing must be placed in a geotextile, otherwise soil particles will clog the pipe. If clay soil is placed back onto the drainage, you could have saved yourself the whole thing since it hardly allows any infiltration.
 

LuckyDuke

2019-04-19 22:30:36
  • #5
Thank you very much for your statement. The general contractor says he has done everything according to DIN. Then I will now confront him with the fact that it is botched.

What would be a sensible approach here? Have him excavate everything again? And the backfilling with silt is also not according to DIN 4095?

Thanks and regards
 

LuckyDuke

2019-04-19 22:43:08
  • #6
Sorry, editing was no longer possible, hence the addendum: Doesn't the drainage pipe also have to be 15 cm away from the [Noppenbahn] according to DIN? In the pictures, you can see very clearly that the pipe is lying directly against the wall.
 

Similar topics
02.02.2009Building materials are stolen at the construction site12
22.08.2013Are the estimated costs of the general contractor for earthworks reasonable?12
04.01.2017Plaster walls in new construction or use fleece?16
10.12.2017Painting work, which color, with fleece or without?13
24.05.2018How to properly mount the bubble foil on the base, experiences?10
11.10.2018Waste on the construction site - What is tolerable?138
02.09.2019Properly installing the dimple membrane, base sealing, drainage?15
23.04.2019Rainwater infiltration through drainage pipe10
26.09.2019Is it allowed to lay KG pipes in gravel?11
15.02.2020Building waterproofing of earth-contacting components16
21.01.2022Terrace slabs on pedestals or gravel?17
23.03.2020Curfew: Am I still allowed to go to the construction site in Bavaria?73
09.04.2020Visit the construction site for ventilation?17
19.08.2021House building - an eternal construction site?33
21.09.2022Camera / mobile phone for documentation in the workshop or construction site13
22.10.2022Drainage in the basement - technically necessary or not?10
15.05.2024Use granite palisades and studded membrane for raised bed?12

Oben