Courtyard access, access paths paving or concreting

Kettkar is not a problem because the tires only run on the top edge of the floor grid. Narrow or small wheels are more problematic.
For us, however, this does not matter because there are no children and there would also be other areas to play (e.g., terrace).

The standard grass grid stones come with grass in the gaps and are very maintenance-intensive. The grass needs light, water, fertilizer, and has to be mowed regularly (at least once a week). This actually means that you shouldn't park a car there for a long time. You also can't walk on it with high heels. If you don't do all of this, weeds grow everywhere, the grass turns yellow, and it looks very unkempt. Regular eco-paving requires much less work.

Best regards
Sabine

I’ll just jump in here as well. I recently saw filler stones for grass grid stones that close the grass openings like a puzzle. Would that be a sensible variation?

Why I’m bringing this up: I’m looking for an affordable surface for a parking space and driveway that is low-maintenance but doesn’t seal off the entire area.

And because I stumbled upon the term: eco-paving simply means paving that only has sufficiently wide joints to allow water (and green plants) to pass through, right? Or does it bring other important nuances in its substance?

My parents had grass grid pavers. Not the ones you always see, but ones where only little studs stick out of the grass on top. In theory great, in everyday use only to a limited extent. Concrete also gets hot in the sun without cars driving over it and scorches the grass in between. Heavily trafficked paths (and it’s enough if a car drives over them four times a day) are usually only covered with grass in spring, when everything is sprouting anyway, for one to two weeks; otherwise, it’s just brown soil. A car that "quickly" stops on the grass grid pavers in front of the garage makes the ground so hot underneath that the grass is damaged even then. The plastic grass grids don’t have the problem that hot concrete scorches the grass, but ours have “wandered” over the years. So when it’s very wet and you drive on them, they just move a little all the time. The grass simply doesn’t grow dense there, and if a car parks - on top of them - the grass underneath gets too hot anyway. In short: I wouldn’t recommend any kind of grass grid. We are trying a newly developed gravel mixture on our parking spot: drivable thyme varieties are delivered in a granulate. They are very resilient, gradually growing over areas where no driving occurs, and where you do drive over it occasionally, they come back; where there is constant driving, nothing grows. At Rick’s place, I could also very well imagine a driveway with the tire tracks made of straight concrete slabs and (decorative) gravel in between. Possibly combined with some non-flowering low shrubs.

Ökopflaster simply means paving stones that have sufficiently wide joints

And guarantees that it does not compact over the years. As far as I know, only Braun offers this so far.

I have to agree with you on some points. Especially regarding the "burning" of concrete stones.

That the plastic grass grids shift at your place was a user error. These are anchored and are also available for heavy-duty traffic... I also know parking lots designed like this. I would only recommend something like that with irrigation and only with little traffic.

Gravel is out of the question for us. We don't like the look and the maintenance effort is quite high. We also considered something with a driving track but didn't find anything suitable. Taller planting in the driveway is not (reasonable) possible or desired. The garden starts immediately behind it.