Garage ceiling, choice of materials?

Hi

Guys hoping you can help

I want to smarted up my single garage, I will attempt to get the walls painted summertime but before that want to tackle the garage ceiling.

As you can see the wooden joints, trusses, what the best way to cover it, a few people have said go for plasterboard and them skim/paint it, which is fine but the garage does get very humid at times (70-90%)

What I don’t want is the plasterboard going damp, the warping then falling on my car and making a mess.

What other choice of materials can I use, chipboard, shower board, ?

Thanks

 

Thanks Wayners, would it be fireproof too? or is it best to stick to damp insulated plasterboard ??

 

Thanks Wayners, would you suggest boarding on top of the joints, then pink plasterboard up on the joints, I wont be using it for storage or maybe insulate it with loft rock wool ?
My main concern is I dont want it all breaking and crashing down after a while with the damp, also will look install an air brick of some sort for ventilation in the garage for air circulation.

Also do i need to think about ventilation above the joints before everything is boarded up, as you can see from the pics there is no vents or air circulation (there will below the boarding though)

 

I

I wont be storing things in there apart from my car

 

Can anyone advise if its worth getting plasterboard with in the insulation built into it, ive seen ones which are 15mm thick, will this suffice or normal pink one be ok or even the foil backed one?
decisions decisions...