RV Maintenance

Every penetration through the exterior envelope is a potential leak, and a mid size coach has somewhere between forty and eighty of them. Roof vents, air conditioning gaskets, antennas, solar mounts, refrigerator vents, plumbing stacks, marker lights, ladder brackets, awning rails, window frames, compartment door flanges and every corner molding. Each one is held watertight by a bead of sealant with a service life measured in a few years, not in the age of the vehicle.

A proper inspection is visual and tactile. Cracked, shrunken, chalky or lifted sealant gets noted and replaced. Compatibility matters, because self leveling lap sealant belongs on horizontal roof surfaces while non sag sealant belongs on vertical seams, and putting either in the wrong place produces a bead that fails early. Old sealant gets removed rather than layered over, since a new bead over a failed one simply traps water against the surface it was meant to protect.

Roof membranes need attention on a shorter interval than owners expect. EPDM rubber chalks and thins under ultraviolet exposure. TPO holds up better but its seams and terminations still move. Fiberglass roofs do not degrade the same way but their sealed transitions do. In every case the failure point is a joint or a penetration rather than the field of the membrane, which is why resealing on a cadence is worthwhile and full replacement is not usually needed on a schedule.

A reasonable rhythm is inspection twice a year and a full sealant refresh on a multi year interval, adjusted for how the coach is stored. A unit under cover ages far slower than one parked in the open. Anything mounted to the roof since the last inspection deserves particular attention, because aftermarket solar and antenna installations are the most common source of new leaks on an otherwise sound roof. Walking a roof safely also requires knowing whether the structure supports it.

Anything that moves has a seal, and every one of those seals is consumable. Slide room wipers and bulb seals compress permanently over time and stop making contact along part of their run. Entry door gaskets flatten. Window seals shrink at the corners. Awning fabric loses its coating and its rail seal lifts. None of these fail dramatically. They degrade until the coach starts collecting dust and water in places it did not before, and owners often attribute it to age rather than to a replaceable part.

Slide seals deserve individual mention because they protect the most vulnerable opening on the vehicle. A slide room cuts a large hole in a structural wall, and the seal around that opening is the only thing keeping weather out of the framing. Replacing wipers and bulb seals is inexpensive relative to repairing the wall damage that follows when they are left too long, which makes it one of the higher value items on any maintenance list.

House systems reward regular attention because failures cluster around dormancy rather than use. Batteries sulfate when left partially discharged. Generators develop fuel and carburetion problems when they sit. Water heaters accumulate sediment. Refrigerators lose cooling capacity when the burner and flue foul. Air conditioners lose airflow to a clogged filter and evaporator long before the compressor complains. Every one of those is cheaper to address as maintenance than as a failure during a trip.

A structured systems check runs the whole house: twelve volt distribution and battery condition under load, converter and inverter output, shore power and transfer switch operation, generator run and load test, propane pressure and leak test, fresh water pressure test, waste valve operation, water heater and furnace ignition, refrigerator cooling on both power sources, and rooftop air conditioning temperature differential. Findings get written up rather than repaired on the spot unless the owner authorizes it.

The plans that work are the ones tied to events rather than to dates. Inspect before the first trip of the season and again after the last one. Reseal when the inspection says the sealant has gone, not when a calendar reminder fires. Service the generator on run hours instead of on months. Check slide seals every time the coach comes back from a trip, since that is when they are already extended and easy to see.

For owners in Eastvale, a practical arrangement is one comprehensive shop visit per year with an inspection and evaluation, then addressing whatever it turns up in priority order. Sealant and seal work goes first because it prevents structural damage. Systems items follow. Cosmetic work goes last unless it is protecting something. That order keeps the budget aimed at the failures that compound rather than at the ones that merely annoy.