Flooring By Tile Experts offers products and services for tub & shower water proofing systems. In our years of experience in bathroom renovations we have noticed moisture emersion causing vapor penetration resulting in leaks and mold growth, which will cause damage to the surrounding structure and lead to an unsanitary environment. Schluters’ Kerdi-Shower System or Kerdi-Board is primarily waterproof and vapor-retardant, unlike cement backer boards which are water resistant but not water proof. Kerdi-Shower System or Kerdi-Board provides an integrated tile backing, and offers a prefabricated sloped shower pan that connects to a water sealed flange, creating a complete water draining moisture management system to ensure successful long-term performance.