Aquabar-B Paper Underlayment
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This product blocks moisture vapor from creeping behind finish materials or reaching moisture-sensitive substrates such as solid or engineered hardwood. To help win the battle, the Fortifiber Building Systems Group ® offers Aquabar “B” as inexpensive insurance to reduce moisture-related problems. Aquabar “B” floor and tile underlayment is an extremely effective moisture vapor retarder for use in a variety of interior construction applications. Consisting of two layers of kraft paper laminated with asphalt, Aquabar “B” is a non-reinforced 30/30/30 duplex type Grade “B” paper.
- Protects hardwood by being and effective moisture vapor retarder and reduces vapor migration to help protect wood floors, tile substrates, and floor and wall cavities from moisture
- Recognized as an NWFA (National Wood Flooring Association) accepted product over wood floors as a Class II vapor retarder membrane
- Slows moisture vapor originating below the floor system, allowing the wood flooring to acclimate gradually
- Permeance rating of less than 1 protects against buckling or cupping
- Less likely than common poly film to trap moisture condensation between it and the sub-floor
- Covers 500 sqft