Outdoor, Large Pools, Tubs, Shower, Concrete Patio, Porch, Deck, Swimming Pools, Tubs, Shower, and Large Patio, Porch, Deck Murren chose maintenance-free materials, such as Stepstone precast concrete pavers for exterior decks and river-rock-covered flat roofs. He recalls his neighbors’ astonishment and delight when “we went from a giant hole in the ground to a two-story house in just four days.”  Photo 6 of 6 in A Desert Prefab Hits the Jackpot in Sin City