I am looking for some advice on attic condensation issues. I have a 50s house with a metal roof with no sheathing underneath it. The attic is vented in the soffits and gable ends and poorly insulated with the equivalent of R19 bats with no vapor barrier. I am losing a lot of heat in the attic I can see it rising off the roof! There is also an air handler in the attic and ducts. I have air sealed the light fixtures and fans but have not yet sealed the top plates of the walls. I am looking into having 1 inch of spray foam put down on the attic floor to vapor and air seal and then have r38 fiberglass blown on top. However it's quite expensive and I'm also not sure if it would solve the issue because I will continue to have warm air lost from the air handler and ducts. Therefore I am looking into having bubble foil insulation placed on the back of the rafters to form a vapor barrier so the air can't hit the metal and then insulating the attic with blown in only. I cannot spray foam the roof deck because of the extra weight on roof system and because of yet more expense. Does anyone know of any other solutions? I know I need air and vapor sealing and insulation but I don't want to go the route of expensive spray foam and still have the issue because of the air handler. Or alternately insulating with only blown in fiberglass and that not fix the issue therefore nesseitating removal of the new insulation. Feels like a wild goose chase. Sorry for the long explanation. Just looking for opinions or alternate ideas.