The ideal way to protect your property from water damage is to waterproof it. Len's Composition Co. specializes in waterproofing services for residential and commercial customers. Using proven treatment, we do effective waterproofing of decks, stairways, balconies, roof decks, planter boxes and multi-layer systems. Call us today for more information.. Desert Crete Systems - Stairs - Decks - Balconies - Floors - Old & New Construction. Magnesite Deck System.