Hello, We have a two storied colonial house with a full basement. Currently in the basement, the space between floor joists are insulated with vapor barrier facing the first floor (kitchen ) aka facing up. We are thinking of finishing our basement and running heat in the basement. Now that we will have heat from both directions ( first floor ) as well as basement which way should the vapor barrier be facing for the insulation. Leave it facing up? move it down ? no need for vapor barrier, meaning change all the insulation. Thanks a lot for your advise.