Another stoopid question...
But how on earth do you pass new wiring over the drywall ceiling (tatamis sized chunks) there are a lot of inspection traps. But how am i supposed to run 4 meters of wires with the trap being point A and... fuck-you being point B ?
The crawl space between the wood frame ceiling and the actual concrete seems to be around 1 meter (+) high, but I don't trust it to carry me inside. Can't even use robots since the crossmembers would make a wheeled one unusable, tracked it might work but aluminum tracks cost a fortune, and I don't feel like building a robot just for this.
(Mom wants a washlets in her loo, but since it's a floor to ceiling pressure washable loo there is not a single electric plug available... and that room is huge... 8 tatamis for 2 shitters... with matching echo...)