If you mean what is called a “tray ceiling”, then yes the entire ceiling should be sealed and not open to the roof space.

Thats the one, couldnt find the name for it.

Thank you, I thought it was abit odd that they have left it open rather then closing it off.

This image is from the top of the ceiling in the raised section. Will have to find something to cover the gap.

Gyprock sheets would be best. Contact a ceiling company . Can you take a photo of the ceiling from back. I don’t understand where the hole is?

**photo of the ceiling from further back.

These are only other photos i have at the moment.

I dont think i am explaining it very well but the first image i posted is from the top of the raised section of the ceiling so looking in to the side of the raised section.

Draw a sketch of side profile of the tray ceiling. But in any case this should be enclosed. And not open to roof space.