hi folks,
i'm planning a diy project, re-roofing an open beam studio and workshop space. i would like to lay down new sheathing (osb or plywood) followed by some type of rigid foam insulation. my question is what next? i've been looking into self-adhesive rolled roofing systems but not sure how compatible that would be with the insulation. any help would be greatly appreciated.

thanks,
xbelanger