Roof Vent and Skylight Repair for West Covina
Vent, powered fan and skylight replacement with full flange re bedding, for West Covina RVs serviced in Yorba Linda.
Short answer. Roof vents and skylights are the most common leak points on any RV because each one is a hole cut through the roof. OCRV Center replaces Fan Tastic, MaxxAir and Dometic vents, powered fans, garnish rings and shower skylight domes in shop in Yorba Linda, re bedding every flange in fresh butyl.
OCRV Center works in shop at 23281 La Palma Ave in Yorba Linda, about 22 miles and 30 to 45 minutes from West Covina.
Request a quote
Tell us about the vehicle and the damage. Insurance walk ins are welcome.
Symptoms that point to this repair
If you recognize two or more of these, the vehicle is worth putting on a lift before the damage spreads.
Vent lid cracked, yellowed or snapped off at the hinge
Fan runs but the lid will not lift or will not close fully
Rain sensor closing the lid on its own or refusing to open at all
Skylight dome over the shower crazed, cloudy or split
Drip coming from the interior garnish ring during rain
Fan motor humming without turning, or turning slowly and getting hot
Interior trim ring stained or separating from the ceiling panel
Why vents and skylights leak more than anything else
Every roof vent is a fourteen by fourteen inch hole cut through the membrane, the decking and the ceiling panel, framed with wood and sealed by a flange bedded in butyl. The skylight over the shower is the same idea in a larger and taller shape. These are the weakest points on any roof by design, and there is no way to build an RV without them since ventilation and light have to come from somewhere.
The vent flange is a thin plastic or aluminum lip held by a ring of screws. Butyl underneath it is what actually seals. The lap sealant on top protects the butyl and the fastener heads from UV and water. When the sealant shrinks, the butyl loses its protection, dries, hardens and stops flowing into the surface irregularities it was supposed to fill. From there it takes only wind driven rain.
Skylights add a second failure mode. The dome is a formed acrylic or polycarbonate bubble that spends its whole life in direct sun. It embrittles, crazes and eventually splits, usually along the crown or at a corner where the forming stress concentrated. An old dome can also break simply from a tree branch brushing it or from someone kneeling near it while working on the roof.
Fan Tastic, MaxxAir and Dometic vents
Powered roof vents are one of the more satisfying repairs because the parts are available and the improvement is immediate. Fan Tastic units are common, use a reversible motor, and offer models with thermostats and rain sensors. Their frequent failures are the lid lift arm, the manual crank knob stripping, and on sensor equipped models a rain sensor that reads dirt or corrosion as water and closes the lid every time you open it.
MaxxAir builds both fans and the vent covers that let a fan run in rain. Their fan lids and the covers themselves are the parts most likely to crack, since both are exposed plastic. Dometic vents are widely fitted as original equipment and their lids embrittle on a predictable schedule in this climate. Across all three brands the failure sequence is the same: the lid goes first, the lift mechanism second, the motor third.
Motor failure presents as a hum with no rotation, or slow rotation with heat, usually from worn brushes or a seized bushing after years of dust. In most cases the whole vent assembly is replaced rather than rebuilt, because the labor to remove the flange, clean off old butyl and re bed everything is the same either way and a new assembly puts a fresh lid, hinge, screen and motor in at once.
Doing the reseal correctly instead of quickly
The shortcut version of this job is to run a new bead of sealant around the outside of the existing flange. It looks finished and it does almost nothing, because the water is already traveling under the flange through hardened butyl and the new bead sits outside that path entirely. It also makes the eventual correct repair harder, since all of that material has to come off first.
The correct version removes the unit. Fasteners come out, the flange lifts, old butyl gets scraped off both the flange and the roof surface, and the substrate around the opening is inspected while it is exposed. That inspection is the real value of the job. The edge of the decking at the cutout tells you immediately whether water has been getting in and for how long, and it is the only time you will see it without cutting the roof open on purpose.
New butyl goes down as a continuous ribbon with no gaps at the corners, the unit is set and the fasteners drawn evenly so compression is uniform rather than tight at one corner and loose at the opposite one. Then self leveling lap sealant covers the flange perimeter and every fastener head. Interior garnish rings go back on last, and stained or swollen ceiling trim gets addressed rather than reinstalled over a fresh repair.
Skylight domes and the shower surround
Shower skylights sit above a wet, humid space, which means a leak there is easy to blame on the shower itself and easy to miss for months. The dome is bonded and screwed to a flange, and the same butyl and lap sealant rules apply. Replacement domes are available in standard sizes for most units and in specific profiles for others, and matching the height and radius matters because a dome that sits differently changes how water sheds around it.
The interior side has its own considerations. The garnish ring around a shower skylight is frequently the first thing to show water staining, and on many units it is trimmed into a one piece shower surround that does not tolerate rough removal. We take that trim off carefully because cracked ABS surround is a far bigger repair than the dome that caused it.
Where the dome has been broken long enough for water to reach the framing, the repair extends into the roof structure. Soft framing around a skylight opening is common on older units, and it has to be replaced before a new dome goes on. Fastening a new dome into rotted wood produces a repair that loosens within a season.
Vent and skylight service for West Covina RVs
This is one of the shorter jobs we do and one of the highest value ones, because a vent that is resealed correctly today prevents the ceiling repair that would otherwise arrive in two years. Most vent replacements are measured in hours rather than days, and multiple vents done at the same visit share setup and cleanup time.
The work is done at the Yorba Linda shop. Butyl needs a clean, dry surface and lap sealant needs undisturbed cure time, neither of which is available in a driveway or a storage lot, and we do not offer mobile service. West Covina owners generally reach us in 30 to 45 minutes on the 10 or the 60 west to the 57 south and the 91 east to Imperial Highway.
When you call (949) 799-3387, tell us the brand stamped on the vent lid or the interior trim, whether the fan is powered, and whether it has a rain sensor or a thermostat. That lets us stage the right assembly. If you are already seeing a stain on the ceiling near the vent, mention that too, because we will plan inspection time for the decking rather than assuming a simple swap.
Questions we get asked
Can you replace just the vent lid instead of the whole fan
Often yes. Lids are available separately for most Fan Tastic, MaxxAir and Dometic models and swapping one is quick if the hinge and lift arm are intact. We recommend the full assembly when the lift mechanism is worn, when the motor is noisy or slow, or when the flange has to come up anyway for a reseal. At that point the labor is already spent and a new assembly puts every wear part in fresh.
Why does my roof vent close by itself when it is not raining
That is a rain sensor reading something other than rain. The sensor contacts sit on the lid or the housing and respond to conductivity between them, so dust, mineral residue from sprinkler overspray, bird droppings or corrosion all mimic water. Cleaning the contacts fixes most cases. If the sensor board itself has failed the fix is replacement, or on some models the sensor function can be bypassed if you would rather control the lid yourself.
How much does it cost to reseal a roof vent properly
It depends on how many vents, what condition the substrate is in, and whether components are being replaced or reused. The estimate is written after we inspect, and the range for vent and fan work is published on our prices page along with the estimate policy. What we will not do is quote a reseal sight unseen and then discover soft decking around the opening, which is why the inspection comes first.
My shower skylight is cracked, can I just tape it until I get in
As a short term measure to keep water out before your appointment, yes, tape and a cover are better than an open crack. It is not a repair. Acrylic and polycarbonate that has crazed enough to split is embrittled throughout, so it keeps cracking outward from wherever it was patched. Get it covered, keep the bathroom vented so trapped moisture can leave, and get it scheduled.
Ready to get a written estimate
We write estimates at the shop and bill your carrier direct. 30 to 45 minutes from West Covina on the 57 and the 91.