have jsut completed construction of 30x60 greenhouse with polycarb covering in souteast ga. becasue of extreme heat, plan on operating from oct-apr only. have considered adding a 6 mil film to the top for insulation/heat conservation. each bottom will be tighly secured. have been wondering whether condensation will develop between the 2 layers which would make the application prohibitive as there would be no exit for runoff.

HELP PLEASE

thanks ever so much