Tile Floor Backer Board Installation Guide
OVER WOOD SUBFLOORS
Note: All backer board sizes and thicknesses can be used as tile underlayments over wood subfloors.
• Using a 1/4” x 1/4” square notch trowel, apply the recommended thin set mortar to the floor, provided the subfloor is even and load bearing.
• Place the backer board panels into mortar and apply weight equally across the surface to ensure strong bond between panel and floor.
• All joints should be staggered so that no seam continues throughout the length of the floor.
• Using the recommended screws and washers, fasten into seams every 12” to create flush transitions.
• All seams and fasteners should be filled in with the recommended joint sealant & spread evenly with putty knife.
Note: for concrete subfloors, make sure the concrete floor is fully cured and free of debris, oil or waxes. Some concrete floors may require priming or vapor retarders prior to thin set mortar installations.
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THE W.W. HENRY COMPANY
400 ARDEX PARK DRIVE
ALIQUIPPA, PA 15001
WWW.WWHENRY.COM
