Which floor covering is suitable for concrete with cable ducts?

Hello everyone,

I am currently wondering what the simplest and most affordable solution is for the following problem:

A few years ago we built our house but did not finish the attic. We only use it as storage space. The attic floor is a concrete floor, on which several cable ducts with a diameter of about 2.5 cm lie, through which the cables for the room lighting of the rooms below run. Since we always bring dirt down with us from above when we have been up there, we thought about laying a floor covering. It should be durable and easy to keep clean, but does not need to be anything special. What would be the simplest solution here? Ideally, I would like to lay laminate, but because of the ducts I do not have a level floor. Or could one lay a grid of wooden beams about 3 cm high and then lay the laminate on top? Maybe you have other ideas? The area is about 70 sqm. A solution under 1000 euros would be nice.

Best regards!

Battens and tongue-and-groove boards or OSB board on top.

Battens and tongue-and-groove boards or OSB panel on top.

yep, the whole thing laid floating. In my opinion, tongue-and-groove boards or ordinary planks are the cheapest and most functional solution. We laid floorboards throughout the whole house this way, just on slightly higher joists that float on the floor. If needed (soundproofing, insulation...) you can also put insulation between the joists (battens) and under the joists maybe edge insulation strip rolls for screed. Costs for 50 meters €10.- Why prefer boards/tongue-and-groove over OSB? OSB is quite expensive, plus you have joints and these should end on joists or meet there. With tongue-and-groove you are freer and it immediately looks stylish like a residential floor.

… or just simply make a trip to the shelves and boxes with floor coverings. Leave the cables free. It doesn't have to look nice, just keep it clean.

yepp, the whole thing is laid floating. In my opinion, rough-sawn boards or ordinary boards are the cheapest and most functional solution. We have laid floorboards throughout the house in this way, only on slightly higher sleepers that float on the floor. If needed (sound, insulation...), you can also put insulation between the sleepers (battens) and maybe under the sleepers some roll material of edge insulation strips for screed. Cost for 50 meters €10.- Why prefer boards/rough-sawn over OSB? OSB is quite expensive, and you have joints that should end on or meet at the sleepers. With rough-sawn boards you are freer and it immediately looks nice like a residential floor.

How far apart can the battens be placed or what is common? I think if the battens leave large hollow spaces, the rough-sawn board would give way pointwise, wouldn't it?

How far apart can the slats be, or what is common? I think if the slats leave large gaps, the tongue and groove boards would give way at certain points, right?

depending on the board thickness and also the load from above, but I think you are good with about 60cm spacing; besides, there is no continuous load. Best to try out on site what you like.