Garage Ceiling

[pvr]

In the garage, I want to sort out the ceiling which is proving a bit difficult.

The joists are not all the same height (measured from the floor) and I have boarded the ceiling using plasterboard. However, due to the joists not being quite the same, the ceiling has a few bulges in those locations and also, the joists were sometimes a little to far apart which made the joints between the board a bit (too) flexible.

I wanted to get the ceiling plastered, but the plasterer did not want to do it because of the flexing of the ceiling as well as the bulges.

What would be the best option? Is there such a material that can be put on the ceiling that is thick and flexible which would not crack on the joists?

Failing that - would the only option be to batten underneath the boards again and put another layer of plasterboard up?

Appreciate your responses

 

[Deluks]

Take the old pb down if you can get the screws out you might be able to reuse it, if it's nailed then rip it out, cheap enough to replace anyway.
Batten underneath, levelling/packing out as you go.

Anything above the garage or is it single storey only? Did you put any insulation up there first?

 

[pvr]

Yes, on top of the joists I put a MDF board (water resistent) floor. Underneath it (i.e. between the joists) I put 10 cm of that white insulation material that you can cut to size.

Just never considered to check that the bottom of the joists were not equal size as the top (where the MDF boards are laying) was perfectly flat.

I used screws to put the boards up, so can indeed take them off again. Think you are right - just wanted to avoid it.

THanks for confirming my worst fears