Hi,

I’ll start this out by saying I might be overthinking this …….

My goal is to prevent condensation on the plywood sheathing of our unconditioned attic that could result in attic mold growth – especially during heating season during our cold climate zone 5 winters where temperatures can get as low as  0 degrees Fahrenheit at times.  

Question:  Is a vapor retarder needed on ceiling/unconditioned attic interfaces when using blown in cellulose or fiberglass insulation of sufficient R value; and if this is the case, is latex paint sufficient (assuming all of the other areas for air leaks have been air sealed?)

Thank you for your time.