Ideas for a low-maintenance house

We will have a balcony directly above, then you can easily spray from above

Maybe you have cleaner air. Mine already looks pretty dirty after a year. Spraying it off doesn’t help either; I’ll have to get on it and pressure wash or scrub. The slope is also quite low at 5%.

Well, maybe you have cleaner air Mine already looks pretty dirty after a year. Spraying it won't help, I have to get on it and pressure wash or scrub The slope is quite low at 5% anyway.

Don't worry.....that takes care of itself with increasing age due to declining visual acuity.
Thus, some disadvantages also have their advantages-

We have no roofing. I also wouldn't know what cleaning effort it would save. You wipe the table anyway. I don't like menus.

The rain generally takes care of that.

If the garden fence is a pollen filter and it rains osmotic water, then yes