Should you use a board or similar under the ceiling

[Trunk]

There we go... Newly purchased house and a happy amateur, so I will probably come up with many good and less good questions in the future.

I can add that I always search first, but since I barely know what things are called, it becomes difficult to get good results. But oh well...

In one room, we're going to fix a new ceiling and have just torn down a bunch of boring white-painted paperboards. Beneath there is plastic, insulation, some rafters (or whatever you call them), and a lot of mouse droppings.

We've been thinking about nailing up some sort of panel, and looking at certain guides, there's always some kind of board before the panel is set.

Do you really need that, or can I nail the panel directly onto the rafters?

I assume it would be more even if you first throw up a chipboard or something like that, but is it really something you think about? It's in an office, so it's not like someone will be sitting and looking at the ceiling unnecessarily.

 

[Liteavvarje]

There is probably sparse paneling up there with C/C 300 mm, are they even? Check by taking a string from one side of the room to the other. If it's OK, put whatever you want on the ceiling without anything in between.
The mice usually come in under the paneling on the outside, there are metal pieces called möchtestopp.

 

[henke_benke]

what you can do is mount some extra pieces of glesen at the lamp boxes.'
the ceiling won't become more even by mounting extra panels.
if the glesen swings a lot, you need to address it on the glesen