RV Roof Repair Shop Serving Tustin: Recoat, Reseal or Replace

An RV roof leak is usually a sealant failure at a penetration, not a failed membrane. Resealing and recoating runs $750 to $4,500 while full membrane replacement runs $3,500 to $18,000 and 20 to 80 labor hours. OCRV Center in Yorba Linda near Tustin identifies the membrane type first, then prices the right repair.

Ballpark range $3,500 to $18,000 at 20 to 80 hours of labor. See the posted rate card.

What kind of roof is on your RV, and why does it matter?

Four types cover almost everything, and each fails differently.

EPDM rubber. The most common membrane on mass market coaches and towables. Black on the underside, chalks white as it ages, and the chalk running down the sidewalls is the usual first sign. Repairs use lap sealant and EPDM specific adhesives. It cannot be heat welded.
TPO. A thermoplastic membrane that holds up better under ultraviolet exposure and can be heat welded at seams, which makes patching cleaner. Feels stiffer and less rubbery than EPDM and does not chalk the same way.
Fiberglass one piece. Common on higher end coaches and many fifth wheels. Rigid, walkable without decking concerns, and it does not tear. It cracks instead, usually at the front and rear transitions, and repairs are laminate work rather than membrane work.
Aluminum. Found on vintage and older stick and tin units. Seams and rivet lines are the leak points, and repair is panel and sealant work.

Using EPDM sealant on TPO, or a general purpose roof coating on either, is one of the more expensive mistakes in this trade, because the incompatible product has to be fully removed before a correct repair can start.

Why is the stain never directly under the leak?

Because water travels on framing before it travels down. An RV roof sits on ceiling framing that runs across the vehicle, so water entering at a vent flange runs along the nearest member until it reaches an obstruction, a wire pass through or a wall cavity, and drops there. It is completely ordinary for an entry point at the front skylight to show up as a stain above the rear bed.

That is why chasing a leak from the inside almost never works, and why a proper roof evaluation starts on top with every penetration photographed. The penetrations are the suspects: vents and fans, the skylight, the air conditioner gaskets, antenna and satellite bases, refrigerator vents, solar mounts, ladder brackets, and the perimeter edge trim where the roof meets the sidewall.

Interior stains only tell you the water has been there long enough to reach a finished surface. By the time a ceiling panel discolours, the decking above it has usually been wet for a season or more, and water damage restoration with subfloor replacement runs $750 to $15,000.

Reseal, recoat or replace: how is that decided?

By membrane condition, not by symptom. Three outcomes come out of a roof walk:

Reseal only. Membrane is sound, sealant at the penetrations has cracked or pulled. Old sealant comes off completely, the flange is cleaned, and new self levelling sealant goes down. This is the cheapest correct answer and the most commonly needed.
Recoat and reseal. Membrane is thinning or chalking heavily but not breached. A coating system is applied over a prepared surface, plus a full reseal. Roof recoat and reseal runs $750 to $4,500 and 4 to 20 labor hours.
Full replacement. Membrane is torn, punctured, or the decking under it is soft. Everything on the roof comes off, the old membrane comes up, damaged decking is replaced, and a new membrane is laid and re penetrated. Membrane replacement runs $3,500 to $18,000 and 20 to 80 labor hours.

Smaller line items that come up in the same visit: roof vent and fan replacement at $250 to $1,200, and skylight repair or replacement at $350 to $2,500. See the posted rates, and the roof repair service page for membrane specific method detail.

Can you walk on your own roof to check it?

Only if the manufacturer says the roof is rated for it, and even then only on the framing. Many towables and lightweight trailers have decking that will not carry an adult between members, and putting a foot through a roof turns a $400 inspection into a structural repair. If you are not certain, the safe version is a ladder at the rear and a look with a phone camera on a pole.

What you are checking for: sealant that has cracked, shrunk back from a flange edge, or gone chalky and crumbly; membrane that has bubbled, torn or gone soft underfoot; standing water that has not drained; and any fastener sitting proud of the surface.

All roof work at OCRV Center happens inside the building at Yorba Linda, where the roof can be worked dry, prepped properly and water tested afterward. That matters more on roofing than on any other repair, because sealant applied to a damp or contaminated surface fails at the bond line regardless of product quality.

How often should a roof be resealed?

Inspect every six months and reseal on condition, which in Southern California ultraviolet exposure usually means every couple of years at the penetrations. Coaches parked outdoors year round need it sooner than units kept under cover, and the gap between the two is larger than most owners expect.

The lowest cost path is to fold a roof inspection into an annual maintenance service, which runs $400 to $2,500 depending on how many systems are on the list. Catching a lifting vent flange during a scheduled visit is a small sealant job. Finding it after a wet winter is a decking and ceiling panel job. Book through the quote request form or read the maintenance calendar on RV maintenance.

What is included

Full roof walk with photographs of every penetration and seam
Membrane identification and remaining thickness assessment
Sealant removal down to a clean substrate, not new sealant over old
Reseal of vents, skylights, antennas, racks and the perimeter edge trim
Interior inspection for stained panels and soft decking above the ceiling
Water test after the work, with the vehicle inside the building

Questions we get asked

How do I know if my RV roof is EPDM or TPO?

Look at a cut edge or an underside corner at the perimeter trim. EPDM is black underneath and white or grey on top, and it feels rubbery. TPO is the same colour through the sheet and feels stiffer, more like a plastic tarpaulin. If chalk residue is streaking your sidewalls after rain, that is almost always EPDM.

Can you patch a torn membrane instead of replacing it?

Yes when the tear is contained and the surrounding membrane still has thickness left. A correct patch means cleaning back well past the damage, using the adhesive system matched to that membrane, and sealing the perimeter. What does not work is a peel and stick tape over a chalky surface, which releases at the edges within a season.

Does a new roof fix a soft floor?

No. Those are separate repairs that share a cause. Water that came through the roof travels to the lowest point it can reach, so a soft floor means the subfloor is already compromised and needs its own scope. Replacing the membrane stops the source, but the wet material still has to come out.

Will my insurance cover roof damage?

It depends on cause. Sudden damage from a tree branch, hail or a low overhang is typically a covered loss. Gradual sealant failure and the water damage that follows is typically treated as maintenance and declined. Documentation of the event matters, which is why photographs taken the day it happened carry so much weight.