Marmox
Marmox Multiboard is a lightweight tile backer board used for waterproofing, dry-lining and to provide thermal insulation. It provides an effective decoupling layer to prevent tiles and grout from cracking due to horizontal movement in the floor. Being completely impermeable to water, Marmox Multiboard is doubly useful in tiled areas prone to moisture such as kitchens and bathrooms. Marmox Multiboards can be used all over the house as an insulation board and then simply tiled over or plaster finished.