Retrofitting exterior sheathing or vapor
I am in the process of renovating an older home in the southeast that never had insulation in the exterior wall. We have taken everything down to the studs, and now have exterior lapboard directly on the 2 x 4 studs with no exterior sheathing or vapor barrier between the studs and exterior cladding. Short of removing and replacing all of the lapboards (which is not economically feasible), how can I best provide an after-the-fact vapor barrier? Building codes normally require that wall insulation be installed with the paper side to the interior of the house. I’d thought of trying to get the inspector to let me do the opposite and then attach an extra vapor barrier to the inside walls prior to hanging sheetrock. Any other ideas?