Alan,

Yeah I saw the comment on the vapor barrier and cringed... That's not a great idea here... I do have R30 over the garage that I added last year, as well as a radiant barrier that I am installing using Attic Foil. The doors are insulated with R10 of rigid foil backed foam, so there is a radiant barrier there as well... And YES it does work well for reducing heat gain, but I want to do everything I can to reduce it further... The walls are masonry (brick).... So yeah, fishing for ideas on that...