Insulating aluminum patio ceiling
 

I have a 12 X 24 patio enclosure with an aluminum ceiling that needs more insulation. Are there any DIY insulating tiles that can be glued to the ceiling?
Alternately could I glue standard blue foam insulating panels to the celling and if so what kind of glue would be recommended and how should the surface be finished?

Your best bet is to replace the ceiling with 4" polystyrene (insulated) panels.
Two layers of blue board would work but, I don't know what the appropriate finish surface would be.