Reference to your article “Smart Retarders for Walls and Roofs,” July 29, 2016
I am in the process of installing Roxul R30 batts in a catedral ceiling. The roof is metal with some type of rubberised barrier under the metal roof. The roof sits on 2 x4 perlins. The Roxul batts will leave a 1 and 3/4 inch space between the batts and the roof
I will then install a nominal 6″ wide v groove white pine ceiling. Do I need a vapor retarder under the pine ceiling? If so what would be best in my climate in central Georgia?
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