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Preservative-Treated Wood with Barrier Membranes FAQs

What are barrier membranes and how do they help provide corrosion resistance?

Barrier membranes have typically provided moisture protection for decks and other applications. When applied correctly, they act as a barrier between preservative-treated wood and metal connectors. In addition to eliminating direct contact, barrier membranes also reduce the electrochemical reaction (which requires moisture) from occurring between the two surfaces. The electrochemical reaction is what causes corrosion to occur. It is important to note, however, that the barrier membrane does not provide protection for fasteners installed through the membrane into the wood.