Similar to the Tycroc TWP building board, it is a hydrophobic solution that does not require additional waterproofing. The extruded polystyrene foam has slopes towards the drain to ensure the proper drainage of water. The water-resistant foam core is covered with a layer of polymer cement mortar, on top of which there is a fiberglass mesh followed by another layer of polymer cement mortar. The set also includes a drain trap. Our selection includes models, both with a common and linear drain body.