Walls: All walls must have a vapor barrier and insulation. The interior walls must have a minimum of R-11 insulation and exterior walls must have a minimum of R-19.
Ceiling: The ceiling must have a minimum of R-19
Floor: concrete ground floors need a vapor barrier only (sealed with concrete sealant). Any above ground floors need to be R-19 with a vapor barrier.
Vapor Barrier: The vapor barrier (6mil polyethylene plastic sheeting) must be on the warm side. The warm side means that the vapor barrier is protect from wine cellar (cold side) by insulation. The vapor barrier put on the wine cellar side will cause the humidity to condensate on the barrier and could cause damage to your walls.
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