The Fortifiber Building Systems Group manufactures building products that help protect builders and owners from water intrusion and moisture that can damage residential and commercial buildings. These products, called Moisture Control Systems, bring together sound building science principles and proven product designs. They provide effective protection against water intrusion and moisture, as well as the problems they cause.
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Multiply Underlayment - Hardwood plywood underlayment from Weyerhaeuser provides a thick, durable surface for vinyl, ceramic and laminate floors. Its solid-face veneer resists punctures, permitting sanding of seams. Panels come in convenient 4x4 squares for easy handling and dimensional stability.
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