This couple had a freezing cold conservatory so we have put a Rockfon ceiling tile which is insulated and not affected by temperature and also 200 mm insulation above the tile.
We have also put clear diffusers in the center of the ceiling to allow daylight so that during daylight hours, they won’t need to use any other lights. We put a bulkhead around the edges to allowers to raise the ceiling in the center to give extra head height. The conservatory will now be warm in the winter and cool in the summer and the room will get much great to use.