Hi,
we’re about to start building soon, and the building permit-free process was not objected to.
However, on the advice of the construction manager, we informed the local authority that rainwater would be infiltrated via a soakaway basin in the garden.
The authority states:
Rainwater must be infiltrated; a calculation of the infiltration system according to ATV-DVWK A-138 is required and must be documented. An infiltration test or an equivalent laboratory test is necessary.
We have no expertise in this matter ourselves. I’ve tried to read up a bit, but the whole topic seems very complex.
As mentioned, we specified a soakaway basin, so the local authority was able to approve it directly and did not have to forward it to the lower water authority.
One neighbor in our new development installed a soakaway tank and prefers it over a basin because it doesn’t create a “wet biotope” in the garden.
Another neighbor who has already built (using the same earthworks company/gardening contractor as we are) installed a trench soakaway system.
Now I’m wondering which option is better or more cost-effective?
Attached is the offer, which also includes the trench soakaway.
The soakaway tank seems to be quite a bit cheaper??
I hope you can help me decide the best infiltration method.
we’re about to start building soon, and the building permit-free process was not objected to.
However, on the advice of the construction manager, we informed the local authority that rainwater would be infiltrated via a soakaway basin in the garden.
The authority states:
Rainwater must be infiltrated; a calculation of the infiltration system according to ATV-DVWK A-138 is required and must be documented. An infiltration test or an equivalent laboratory test is necessary.
We have no expertise in this matter ourselves. I’ve tried to read up a bit, but the whole topic seems very complex.
As mentioned, we specified a soakaway basin, so the local authority was able to approve it directly and did not have to forward it to the lower water authority.
One neighbor in our new development installed a soakaway tank and prefers it over a basin because it doesn’t create a “wet biotope” in the garden.
Another neighbor who has already built (using the same earthworks company/gardening contractor as we are) installed a trench soakaway system.
Now I’m wondering which option is better or more cost-effective?
Attached is the offer, which also includes the trench soakaway.
The soakaway tank seems to be quite a bit cheaper??
I hope you can help me decide the best infiltration method.
RobsonMKK schrieb:
I think that is a bit low. In our development plan, 3 cubic meters are already required. The actual need is just under 4.
What do you want to dispose of in 1.2 cubic meters? I can only tell you what Graf calculated. I think it also depends heavily on the region. After all, the amount of rainfall is factored in.
RobsonMKK schrieb:
I don’t understand your question. Iglus can only be installed horizontally, how else would that work? With infiltration boxes, you can, if necessary, go completely vertical. Well, quite simply, the tunnel is not built vertically since it is only 51cm (20 inches) high, but laid out lengthwise at 4.6m (15 feet), so it uses the horizontal area.
The iglu is deeper than it is wide, so it is built vertically.
305er schrieb:
Well, it’s quite simple: the tunnel isn’t built downward since it is only 51cm (20 inches) high, but is laid out lengthwise with 4.6m (15 feet), so it covers an area. The igloo is deeper than it is wide, so it is built downward. I think I need to explain a bit.
Both igloos and tunnels are built horizontally.
Example igloo: I have 8 igloos; how are they arranged? Horizontally, because building downward is not possible.
Example tunnel: I need 4 tunnels for the same purpose. I can build them one after another, or I can arrange them in 2 rows of 2.
Example boxes: for the same purpose, I need 16 boxes. I can lay all the boxes out on one level. Or, and here comes what I mean by depth, I can dig deeper and place one layer of 8 boxes, then put the next 8 boxes on top (so instead of 66cm (26 inches) in depth, I go 1.3m (4 feet) deep). I can basically do this as often as needed; this option isn’t available with the other types.
I hope this clarifies what I mean.
@305er: Sorry if I missed it. How many liters do you need to infiltrate, and what is the roof area? According to the chart, for our 265 m² (2850 ft²) roof area, it looks like over 10,000 liters (24 units of 420-liter boxes) are required. Does that sound right? It seems like a very high amount to me.