Using thinner sparse panels than 28x70 for plastered ceiling

[Herr Klocka]

Hello everyone, we have an old plank ceiling that we are going to cover with drywall. The furring strips will be placed directly on the planks, and we are wondering if we can use a thinner panel than the standard 28x70 to save on ceiling height? At least 22x70, but preferably even thinner if possible. I've read other threads on the forum where people have written that the drywall can start to sag if a panel that's too thin is used, but since we have a plank ceiling and can screw as tightly as we want, shouldn't that not be a problem? Or am I thinking incorrectly?

 

[Småbrukaren]

You don't really need any slat panel at all. The slat primarily does two things: creates space for 16mm flexible conduits for electrical wiring and room for recessed downlights, and allows for adjustments to ensure that the ceiling is level.

 

[Herr Klocka]

Thank you for the response. I should have mentioned that. The reason we are installing the panel is to make room for piping. But as I understand it, 28 mm is quite generous, and VP pipes should fit under thinner panels as well?

 

[heimlaga]

Is it possible to run the pipes in the ceiling fill from above?

In Finland, 22mm is the standard thickness for battens behind the plasterboard. Then the electrical conduits just fit in.

 

[Herr Klocka]

Unfortunately not. It's built over.

 

[tergo]

Or am I thinking wrong?

No

 

[Herr Klocka]

No

Thanks, that's good

 

[JK87]

22*70 works too, thinner than that I would not have used.

 

[Herr Klocka]

22*70 works too, thinner than that I would not have used.

Ok, thanks. Why would you not use thinner? Is it because the wood becomes too weak and unreliable? Ideally, we would have preferred to use this thickness (15x70) namely

https://www.byggmax.se/15x69-planhyvlad-furu-p08315069#913=80997