Hello!
We are currently in the final stages of our planning. A soil survey has already been completed.
Now our architect needs the dimensions for an infiltration system (most likely as a chamber).
We requested these dimensions from our geotechnical engineer, who is now asking for almost twice as much money for the sizing as for the entire soil survey (more than 800€).
Is this price justified? It seems very, very high to me.
From my research, a calculation according to "DWA A 138" is quite straightforward if you have the necessary data and formulas (there are, for example, Excel templates or online tools available). This should not take a skilled engineer more than 1 to 2 hours, or are we missing something?
Unfortunately, the quote only mentions a flat fee and provides no further details.
Thank you very much!
We are currently in the final stages of our planning. A soil survey has already been completed.
Now our architect needs the dimensions for an infiltration system (most likely as a chamber).
We requested these dimensions from our geotechnical engineer, who is now asking for almost twice as much money for the sizing as for the entire soil survey (more than 800€).
Is this price justified? It seems very, very high to me.
From my research, a calculation according to "DWA A 138" is quite straightforward if you have the necessary data and formulas (there are, for example, Excel templates or online tools available). This should not take a skilled engineer more than 1 to 2 hours, or are we missing something?
Unfortunately, the quote only mentions a flat fee and provides no further details.
Thank you very much!
guckuck2 schrieb:
PS forget the cistern, it's not worth itWhy not? We don’t have one, but seeing how fast the water meter runs when watering, I would be happy to have a 10m³ (10,000 liters) cistern. Especially since a soakaway is mandatory here.H
hanghaus20005 Jun 2021 13:23guckuck2 schrieb:
PS forget the cistern, it’s not worth itSuch general answers are not helpful without an explanation.
imsi123 schrieb:
You could contact the company Graf directly, for example. I bought the material from them, and they calculated the size of the infiltration trench (soakaway) free of charge. The data they needed was already included in the soil report and the drainage plan from the architect. Great! Although I have visited their website several times before, I completely overlooked this. I will contact them directly! Thank you very much.
Regarding the topic of whether to install a cistern or not, I would also be interested to know why one might choose not to install a cistern. Even if the water might drain quickly, it still saves quite a bit, doesn’t it?
H
hampshire6 Jun 2021 11:43You can calculate a cistern as a standalone investment and find that the ROI is long. However, you also have opportunity costs, since the alternative to a cistern is not “no expense.” This changes the calculation quite a bit.
Furthermore, using rainwater for the garden is also environmentally sensible.
An alternative would be a private well.
Furthermore, using rainwater for the garden is also environmentally sensible.
An alternative would be a private well.
hanghaus2000 schrieb:
Such general answers are not helpful without an explanation.Anyone who understands basic arithmetic can figure this out for themselves. This discussion has already been covered here dozens of times.
Similar topics