Your 2-inch thick cabinet bottom and poorly routed PEX lines are classic examples of RV manufacturers prioritizing cost over space efficiency. These issues can be addressed through cabinet modification and PEX rerouting.
No hot water pressure with working cold is usually stuck backflow preventer in hot water outlet. Located near tank connection behind water heater. Tapping the device or manipulating the spring frees the stuck valve.
After roof repair with Kool Seal, check for hidden water damage by pressing walls for soft spots, inspecting behind cabinets, and monitoring for musty odors. Hurricane rain enters sideways - check window seals too. Remove interior panels in affected areas to verify insulation is dry.
Your comprehensive rebuild plan is solid, but focus on structural integrity preservation, proper moisture barriers, and weight distribution. Critical areas include electrical safety, plumbing rerouting, and maintaining slide-out mechanisms.
In the Bay Star 3826, the half bath black tank vent typically runs through or near the electrical cabinet, while the rear bath vent usually routes through the bedroom wall cavity or bathroom wall up to the roof. Both vents terminate at roof-mounted vent caps.
Onan generator isolators available from Cummins dealers, RV parts suppliers, or industrial suppliers like Grainger. Measure bolt size and diameter to match if using generic mounts.
Jayco builds cabinets in-house, but many independent shops in Elkhart-Middlebury specialize in RV woodwork. Search locally for RV cabinet shops, ask dealership service departments for referrals, or contact Jayco parts department for supplier info.