Hello all, In one of my rentals, the concrete floor on the exterior staircase landing has cracked and some of the pieces have started to come loose. See attached images. It seems that the concrete was cast on plywood deck. Can you guys suggest what is the best suitable repair procedure for this? Do i have to tear up the entire landing concrete and redo it? Since this is exterior, I am also worried about the durability of the fix. Thanks in advance.