Originally Posted by Pink
Im thinking of using plasterboard in ceiling, but then i have see some light ceiling board/tiles ( i think 60x60) are they good? Better than plasterboard?I will isolate in top of ceiling.
If you're going to insulate above the ceiling then it's plasterboard. If you need regular access to the roof space then 'light ceiling board/tiles', no insulation. IMO don't insulate above the plasterboard also, as the rising heat won't get through. I see no reason to insulate anything here.