Hanging curtains - drilling + dowels or adhesive screws

We moved into our house at the beginning of July. Currently, the question arises regarding the hanging of the curtains / curtain rods.

a) Drilling and placing anchors in the wall: Technically probably cleaner than adhesive screws. But also: risk of hitting the roller shutter box or a hidden electrical line.

b) Adhesive screw for masonry and stone, holding capacity 10 kg, on the wall: You save the drilling. But since the adhesive screw is placed directly on the (outer) wall or roller shutter box, mold could of course form between the adhesive surface and the wall, right?

c) Adhesive screw on the concrete ceiling: correspondingly lower mold risk since no outer wall.

We tend towards solution c) but are grateful for any suggestions/warnings etc.

If you prefer ceiling mounting, I would use anchors. You can double-check with the cable detector just to be safe. But actually, there shouldn't be any electrical lines running there...

Plug and screw. Electrical wiring can be located with a detector. A curtain is a dynamic load. Not only must the adhesive be very good, but the bonding surfaces and area must also be correct. Adhesive bonding will only bring long-lasting enjoyment in exceptional cases.

Super thanks for the info. So we decided to go with drilling, I also consulted again with the manufacturer of the adhesive screw, who said the same as Hampshire.

I like sticking all sorts of things to the ceiling and wall. But with curtain rods, the contact area is quite small. Buy/rent a rotary hammer, then it will be done quickly. Put in the plug and done.