If your budget is near enough for Aluminum decking, tear it (all) out and pour the whole thing (or the area in question) in stamped concrete??
42" WFO,In Progress
-Brick vert smoker, Tuscan wood grill, 22" Weber, ECB-sent to the curb! Superfast PINK Thermapen
Offically a ZERO
"When it comes right down to it, you just want to be surrounded by good people and good food."