I have shed floor that appears to be a sheet of 3/4 inch pressure treated plywood nailed to the joists. While the floor is "sturdy" in that it's holding up fine and shows no sign of rot, it feels extremely soft.
My steps feel springy and even my 350lb table saw can rock back and forth on the floor. There's just a lack of stiffness to the floor and things move and shake around as I walk on it.
Would adding another sheet of 3/4 inch plywood help make the floor more stiff?
Unfortunately I really don't have the time or resources to jack up the shed and potentially sister the joists, which would probably be the better solution.