I'm building a new home with a 34 x 14 ft. 2nd story covered balcony. Broward County Florida building code requires a 4" slope to the floor for drainage even though the area is covered by a roof. This slope is very apparent and i'm looking for a way to reduce it using a sub-floor system. Using tile and building one end up with mud won't pass inspection and adds too much weight. I don't want a wood floor look so that rules out Trex, etc. Is there some type of system that can be installed to allow drainage and permit a snap together tile system?