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Desert Crete Decking System is a water proof 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, waterproof flooring system in a knock-down textured finish.
Preparation of Sub Floor
Installation of System
After all required flashing is in place and primed, thoroughly secure hot dipped galvanized expanded metal lath (2.5 lbs. per square yard) upon the wood sub floor. Lap metal lath sheets together a minimum of 1″ and lap all metal flashings with lath up to 1/4″ – 1/2″ from the vertical riser of the flashing. It is recommended to use galvanized staples, minimum 16 gauge, with wide crown (1″ – 7/8″) by 5/8″ long. Lath must be secured, without any deflection, upon the wood sub floor. A minimum of 24 staples per square foot, spaced not to exceed one staple per every 6 square inches is recommended.All metal lath lap joints must be secured together with staples no greater than 1 inch apart.
Trowel Desert Crete Polybase, thoroughly mixed with water, into the metal lath. Make certain that all holes in the lath are filled to the top of the lath. Allow to dry thoroughly before proceeding (2-3 hours, depending upon conditions).
Apply 3/4 oz. per sq. ft. fiberglass matting to the first Desert Crete Base application. Lap fiberglass 2″ over flashings. Cut fiberglass to fit around posts and drains. Generously apply Bonder 480 into fiberglass matting by using a 3/4″ – 1″ nap roller. Bonder 480 is designed to penetrate and soak through matting; thereby, adhering the matting to the Base surface.Allow to dry thoroughly before proceeding.
Apply Desert Crete Texture thoroughly mixed with Desert Crete Liquid Polymer, by pneumatic hopper gun equipped with a 1/8″ orifice and a medium setting in the circular spray plate. Allow 5-10 minutes before knocking down the splattered texture with a steel trowel. Allow 1-2 hours for drying before proceeding.
Apply two coats of pigmented Desert Brand Concrete/Masonry Floor Paint and Sealer (CMFPS). Allow 1-3 hours between coats, depending upon temperature and humidity. Periodically maintain system by applying a coat of pigmented CMFPS.