ᐅ Conduit Costs – Network, Satellite, Backup

I also made horizontal slots – including in the well-known installation zones. I didn’t feel comfortable with this and, of course, documented it. However, only those at the top near the ceiling – I would never do that at the bottom...

But in the majority of buildings I am familiar with, you don’t see horizontal slots – this is often discouraged because it can cause problems.

How is a homeowner supposed to know about a (non-binding) DIN standard regarding the installation zones?

Sebastian79 schrieb:
But in most of the buildings I know, you don’t see horizontal slots – that’s often frowned upon because it causes problems.

Honestly, I don’t see any problems. Not at the finished floor level + 15–45cm (6–18 inches), because when would you even drill a hole there? I can’t remember the last time I fastened anything at that height.
Below the ceiling, sure, but still unlikely.
Since I did all the work myself, I know every pipe and cable by name.

Sebastian79 schrieb:
How is a homeowner supposed to know a (non-binding) DIN standard for installation zones?

In my opinion: Anyone handling a drill should know this. A quick Google search for "where can I drill" is enough here.

Yeah, me too – it was just my personal opinion. And I don’t think everyone immediately turns to Google if they don’t expect anything there (just thinking vertically).

But I do find your clutter up there on the ceiling quite a lot – though the structural engineer surely approved it anyway.