help required for accoustic false ceiling

[sjw170866]

i am doing a home theatre 25feet x 40 feet on terrace. The roofing material is aluminium galvanised puff. what should be my false ceiling. i am also installing 2tons x 5 nos cassette type roof mounted airconditioners.i want help with accoustics n false ceiling. what shd be size of screen & height from floor.
Also help me with buying projector,screen & all accessories.

 

[sud98]

Merge your threads into one for better response. As people have already responded to that. For this specific query, check sam9's home theater construction part 1 as he has a galvanized roof top.