Location of Vapor Barrier
I am insulating under a 1930’s house on brick piers open around the perimeter located on the Eastern Shore of Maryland. The floor is constructed with 3/4″ T&G flooring nailed to joist. For insulation, there is currently R25 Rockwool insulation which is exposed to the elements below. There currently is no vapor barrier installed. I am planing on adding another layer of rigid foam insulation to protect the rockwool and to add another layer of R-value.
I am concerned about moisture being trapped between the layers of insulation. Any recommendations would be appreciated.
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