Doorside slide floor sagging
Just noticed that the floor on the doorside slide is sagging. The floor close to the body has dropped such that you can see light on the inside and the blade of a kitchen knife can be inserted through. It appears to be approximately 12-14 inches long. The flooring does not appear to be soft when tested with a knife point. Any ideas as to what causes, how to correct and how to prevent? Is this something I might correct or will it require professional haep?
2016 FR Wildcat 327re 5th wheel
2013 Ford F350SD