HardieBacker Cement Board with HydroDefense Technology from James Hardie has a 100%-waterproof composition throughout the board. Passing the ANSI A118.10 test for waterproofness, it offers built-in protection from water, eliminating the need to spend extra time applying waterproof coating across the entire surface area of your board. Joints and fasteners will need to be waterproofed. Some application areas such as shower pans may require additional waterproofing. Refer to local building code requirements.
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