I want to avoid creating a problem with condensation.
I have a patio with a scilion roof, single skin corogated colorbond roof sitting on bhp steel rafters with no sarking.
I want to insulate and put in a ceiling.
The total (thermal resistance) R value needs to be 3.
I want to keep costs to a minimum.

Patio with no walls so what would the inuslation accomplish? There will not be much of a condenbsation issue if the inside of the pation is the same temp as the outside air or am I missing something here