100x Stainless Steel Washers for Tile Backer Boards Our Tile backer board fixing washers have been specially designed to provide an easy and secure way to fix Thermopanel, Marmox and Wedi type insulation boards to floors and walls. The washers are easy to fix and have been specially designed for use with Tile Backer Boards in three specific ways. 1: The washers are countersunk to allow the screw head to pull into the board but the outer rim of the disc to remain flush with the board surface. This is to maintain the flat board surface ready for easy unhindered application of the subsequent layers. 2: The Washers have a perforated surface to maintain maximum board surface exposure as standard adhesives and plasters are not designed to be fixed to flat metal surfaces.
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