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Keeping the Rain Out: Sealant vs. Waterproof Membrane?
Been looking into protecting my deck better and narrowed it down to sealants or waterproof membranes. Sealants seem easier to apply but membranes sound longer-lasting...anyone here tried either? Curious what worked better for ya.
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A membrane isn’t automatically the longer-lasting choice. It has to form a continuous surface at the edges, joints, posts, and other penetrations, and the deck needs a way to drain water off it. If those transitions can’t be sealed reliably, or the deck can’t shed water, a membrane may trap moisture in the assembly. In that case, a coating made for that deck construction, or a different drainage detail, may be the better fit. Follow the system manufacturer’s instructions for the specific deck and substrate.