I have an approximately 600 sqft concrete pool deck area. When I bought the house it was covered by rug material best described as "astroturf." This created wetness retention issues plus mold/mildew in certain shaded areas. It was removed and I replaced it with a spray on mortar/cement and stencil/pattern type product. This created a hard surface that looked like tile and grout but was about 1/8th inch thick. It looked great for about ten years but cracks developed, water got underneath and this surface has been flaking off in a number of areas for several years. My question is: what ideas do you have to cover this area with a minimum of removal of the old surface. My top choice so far is interlocking rubber/plastic tiles about 1/2 inch thick from a supplier called Greatmats. Has anybody used these? Other ideas?