Overhead bunk cab floor repair-Winnebago Mini 24V 2003

Update on floor section replacement. Water leaked in at in effective corner molding/seal. Front most section of floor was 3.5" plywood. Removed and replaced with PVC trim board supported by 2 pieces of aluminum angle bolted to aluminium frame. Required removing interior panel section but I think worth it to add additional support and strength. 2003 Winnebago Mini 24V