SR Floorboard is a 5/8″ thick composite flooring underlayment consisting of a rigid phenolic-treated honeycomb core molded between two layers of high-density glass fiber. SR Floorboard is often used beneath gypcrete, concrete, cement backer board, or plywood build-ups. SR Floorboard ships in 4′ x 8′ sheets, is lightweight and easy to cut and install, and withstands live loads up to 1000 PSF.
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