RV Skylight Repair in Sebastian
Cracked, yellowed, or leaking skylight? Florida's UV destroys RV skylight domes faster than anywhere else. We repair and replace skylights on-site with UV-resistant upgrades. $150 to $600.
The Short Version
- Florida UV turns clear skylight domes yellow and brittle within 3 to 5 years
- Cracked domes and failed seals are the 3rd most common source of RV roof leaks
- We carry standard 14x14 and 14x22 replacement domes on the truck for same-day service
- UV-resistant polycarbonate upgrades last 8 to 12 years vs. 3 to 5 for standard acrylic
- Pricing runs $150 for a reseal to $600 for a full assembly replacement with upgrade
How Florida Sun Destroys RV Skylights
RV skylights take a beating in Indian River County. The acrylic plastic that most manufacturers use is rated for moderate UV exposure, not the 230+ sunny days per year and UV index of 10+ that Sebastian delivers from April through October. Within 2 to 3 years of full-time outdoor storage, that clear acrylic starts yellowing. By year 4 or 5, it's brittle enough to crack from thermal expansion, a hailstone, or even a heavy rain impact.
The problem isn't just cosmetic. A yellowed skylight blocks natural light and makes your RV interior feel dark and cramped. A cracked dome lets water in every time it rains. And even if the dome looks intact, the sealant between the skylight frame and the roof membrane can fail independently, creating a leak path that's hard to spot from inside because the water runs along the frame before dripping onto the ceiling.
Common Skylight Problems We Fix
Cracked domes are the most obvious issue, and we see them on about 40 percent of the RVs we inspect in Indian River County. The cracks typically start at the corners where stress concentrates during thermal expansion. A single 95-degree day followed by a 72-degree evening creates enough expansion and contraction to propagate a crack that started as a hairline into a visible split.
Yellowed and hazed plastic is the second most common problem. UV breaks down the molecular structure of acrylic, causing it to oxidize and turn yellow-brown. Some owners try to restore clarity with plastic polish, but that only removes a thin surface layer and the yellowing comes back within a few months. Replacement is the only permanent solution.
Seal failure happens when the butyl tape between the skylight frame and the roof dries out and loses adhesion. This can happen even when the dome itself looks fine. You'll notice it as water stains on the ceiling around the skylight perimeter, or sometimes as a musty smell near the skylight that gets worse after rain.
Trim Ring and Frame Issues
The interior trim ring holds the skylight assembly to the roof from the inside. Over time, the plastic tabs that secure the trim ring can break, causing the ring to sag or rattle when you drive. If the trim ring is damaged, we replace it as part of the skylight service. We also check the frame itself for cracks or warping. In most cases, the frame is reusable even when the dome needs replacement. But if the frame has cracked from UV degradation, we swap the entire assembly.
Condensation Problems
Single-dome skylights are notorious for condensation in Florida's humidity. Warm, moist air inside your RV rises to the ceiling and hits the cooler skylight surface, creating water droplets that drip down and look exactly like a roof leak. We get calls about this regularly, especially during the cooler months when the temperature difference between inside and outside is greatest. The fix is upgrading to a double-dome insulated skylight that creates an air gap between the inner and outer layers. That air gap prevents condensation by keeping the interior surface closer to room temperature.
Replacement vs. Repair Decision
We repair when it makes sense and replace when it doesn't. A seal-only repair on an intact, clear dome is straightforward: remove the old butyl tape, clean both surfaces, apply fresh butyl tape, and reseat the dome. Takes about 45 minutes and costs $150 to $250. If the dome is cracked, yellowed, or brittle, we replace it. A dome-only swap runs $200 to $350 and takes about 30 to 45 minutes. If the frame is also damaged, a full assembly replacement runs $350 to $600 and takes 1 to 2 hours.
We always recommend upgrading to polycarbonate when replacing a dome. It costs $30 to $60 more than standard acrylic and lasts 2 to 3 times longer in Florida sun. It's also 200 times more impact-resistant, which matters during hurricane season. Patrick carries the most common standard sizes (14x14 and 14x22) on the truck, so most replacements happen in a single visit. For custom sizes, we order the part and schedule a return trip within 3 to 5 business days.
Proper Sealant Application
The sealant between the skylight frame and the roof is critical. We use non-hardening butyl tape, not silicone or polyurethane, because butyl tape remains flexible and maintains adhesion through the thermal cycling that Florida's climate delivers daily. Silicone might seem like a good idea, but it doesn't bond well to EPDM or TPO and becomes a maintenance nightmare when you need to reseal later. We apply a continuous bead of butyl tape around the entire frame perimeter, press the assembly into place, and then apply Dicor lap sealant around the exterior edge as a secondary seal. That double-seal approach is what keeps water out for years.
If your skylight is cracked, leaking, or turning yellow, call us at 772-238-8487. We'll get it fixed before the next rainstorm.
RV Skylight Repair FAQ
It depends on the type and severity of the crack. Small hairline cracks in the outer dome can sometimes be sealed with a UV-resistant adhesive, but that's a temporary fix that lasts 6 to 12 months. If the dome is shattered, has multiple cracks, or is severely yellowed and brittle from UV damage, replacement is the right call. In Florida, we replace about 85 percent of the cracked skylights we see because the UV damage has already compromised the plastic to the point where patches won't hold long-term.
A simple seal repair around an intact skylight runs $150 to $250. Dome-only replacement costs $200 to $350 depending on the size and whether it's a standard or custom shape. A full skylight assembly replacement including the frame, dome, and trim ring runs $350 to $600. The main cost variables are the skylight size (14x14 inch standard vs. 14x22 inch or larger), whether it's a single or double dome, and if any roof substrate damage exists around the opening.
Yes. We recommend polycarbonate skylights over standard acrylic for Florida RVs. Polycarbonate is 200 times more impact-resistant than acrylic and holds up significantly better against UV degradation. Brands like Heng's and Specialty Recreation offer UV-stabilized polycarbonate domes that last 8 to 12 years in Florida sun compared to 3 to 5 years for standard acrylic. The cost difference is about $30 to $60 more per skylight, and it's absolutely worth it in this climate.
Absolutely. Most factory skylights are single-dome acrylic units that yellow and crack within a few years in Florida. You can upgrade to a double-dome insulated skylight for better temperature control, a tinted dome to reduce heat gain, or a vented skylight that opens for airflow. As long as the roof opening is a standard 14x14 or 14x22 size, upgrades drop right in. We carry the most common sizes on the truck and can usually complete the upgrade in under 2 hours.
A dome-only swap takes 30 to 45 minutes. We pop the old dome off the frame, clean the seal surface, apply fresh butyl tape, and press the new dome into place. A full assembly replacement takes 1 to 2 hours because we need to remove the interior trim ring, pull the entire frame from the roof, clean and prep the opening, apply new butyl tape sealant, install the new assembly, and reseal the exterior. We then water-test to confirm it's watertight before we leave.
If you can't get to us right away, cover the skylight with a piece of Eternabond tape or even heavy-duty plastic sheeting secured with butyl tape around the edges. Don't use silicone caulk as a temporary fix because it's nearly impossible to remove cleanly later and can interfere with a proper repair. The tape method will keep water out for a few weeks to a few months depending on conditions. Just make sure the surface is clean and dry before applying the tape or it won't stick.