Desert Crete Decking System is a fire-retardant walking deck and roof covering system. When installed as specified, the system may be used as a walking surface for most types of exterior floors, decks and stairs that are common within buildings such as apartments, condominiums, commercial offices and single family residences.Desert Crete Decking System is a multi-step polymer modified cementitious type system that is designed to be covered with a variety of top-finishes. The following specifications describe the procedures that will produce this high quality, water resistant flooring system in a knock-down textured finish. You can repair your balconies, walkways, courtyard and even your existing Magnesite Flooring.