We are installing an engineered hardwood oak floor in our living room. The space is located just above our crawlspace. The crawlspace is sealed with a 10 mil plastic and insulated along the foundation with a high grade spray foam. We are in coastal southern Maine (very cold, dry winters and hot, humid summers).
Is it still recommended that for an underlayment we have some type of vapor barrier? Like a combination felt/vapor retardant type? Or do we even still need a vapor barrier? Is there such a thing as having it "too insulated" thus causing the wood to not be able to breath properly? Thanks for the help!
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