ᐅ permeable paving / permeable pavement

Good morning,

Our driveway is approximately 10 x 5 meters (33 x 16 feet) in size. According to the development plan, we have to use permeable paving, such as drainage or eco-pavers.

We were advised to slightly slope the entire surface and to install a channel drain at one corner.

Is something like this really necessary with drainage paving? I have never consciously seen this and can't quite imagine it.

Best regards,
Katrin

We installed permeable paving and shaped it to form a type of channel. Specifically, we laid two rows of pavers near the curb in a slightly wedge-shaped pattern. In hindsight, I have to say that this was not necessary. Even during heavy rainstorms, water does not collect anywhere to flow into the channel. Water lands on the surface and then infiltrates. With standard paving like the neighbors have, you can see a film of water and sometimes water running into channels. But this also depends on the slope and what local regulations require. We have a slight slope towards the street.

Now, in winter, snow tends to stay longer on our paving, and when it is wet, it remains wet longer compared to regular paving. But our area is almost completely shaded. Salt is not allowed in winter on permeable paving. It will be interesting to see after a few years whether dust or other debris affects the infiltration capacity.

Hm, we have it the same way as World – one row of stones lower towards the drain – and I have never seen water deliberately directed towards the channel. However, I am rarely outside during heavy rain.
In any case, the water soaks away; our driveway dries much faster. However, over the damp winter, the stones turn green – which doesn’t bother us, as the sun takes care of that once it shines on them again.

Take a look at the zoning plan/building permit to see exactly what it states...

In our case, it says "Infiltration must take place on the property" and also "The structure must not be airtight or watertight," which many neighbors interpreted as meaning "permeable paving," but that is WRONG.

So, first check carefully, then continue planning.

Either way, the advice is correct regardless of the type of paving chosen: in the event of heavy rainfall, you are liable for any damage caused by water illegally discharged onto the street.

The development plan states:

"All surface water must be directed to the surface water drainage system or retention facilities, unless it is collected in rainwater harvesting tanks and used on the property."

It also requires that surfaces in open areas be permeable for infiltration.

So, in the case of heavy rainfall, there will still be some surface water that does not infiltrate immediately?

This should be the standard case ... water cannot seep away that quickly ...