ᐅ Installation of electrical conduit pipes in the concrete slab – experiences

Hello everyone,

We are planning a house without a basement. I would like to install some vibration-resistant empty conduits (DN25) in the concrete slab to connect roller shutters, power outlets, LAN, satellite, etc. on the ground floor and to relieve the installation zone on the unfinished floor.

However, I am wondering: if I have about 5 empty conduits protruding per room on the ground floor, it might be quite difficult for the person who will later roll out the vapor barrier on the unfinished floor (S200), since a precisely sized hole has to be cut for each conduit, which then needs to be properly sealed.

Does anyone have practical experience with this type of installation?

Thank you very much

What exactly do you want to relieve there? Whether there is one cable bundle or multiple cable bundles lying on the raw subfloor doesn’t really matter... later on, there will be underfloor heating installed everywhere above it.

Have you discussed this with the contractors involved?

The utility connections also penetrate the vapor barrier in several places. So, I don’t really see a problem there.

However, since you want to do it yourself, which means extra work for the contractor, I am more inclined to think that you would also need to ensure the airtightness yourself.

For just a few cables, the extra effort (conduit, pull wire!, routing + sealing on all levels) does not make sense. You are not only obstructing the S200 but also the floor insulation.