ypg
2019-01-16 10:13:36
- #1
The general contractor said that we do not have a rainwater shaft. The development plan states: The rainwater from the roof surfaces is to be infiltrated via near-natural infiltration systems, as long as it is not used as utility water.
Or does it always have to exist??
No, it does not have to. But it is the most cost-effective alternative. If there is no shaft but the requirement for natural infiltration systems, then these have to be built. The fact is: it is about connecting the downpipes to a place where the rainwater collects and then is naturally led away into the ground from there. However, I am not an expert in this. Either the downpipe water goes into a cistern and infiltrates there, or this cistern collects and leads it back to the house. Then there are these natural systems, usually a small basin/small pond (size is calculated)... it is a bit more expensive to install. One neighbor of ours has such a stone basin (a really nice highlight in the garden on a 650 sqm property), another has this basin under his wooden terrace, which saves space and is also an option for you. If, as with the OP, the rainwater is discharged into the sewer system, you pay monthly/annual fees for this disposal.