# RV Fiberglass Repair Serving Tustin: Identify It Before You Price It > Four different failures get called fiberglass damage: gelcoat spider cracking, impact fracture, seam or cap separation, and delamination. Only the first is cosmetic. Cap repair runs $750 to $12,000 and delamination repair $1,500 to $20,000 at OCRV Center in Yorba Linda, twenty five minutes from Tustin. Identify which one you have first. Source: https://ocrv.biz/rv-fiberglass-repair/ Business: OCRV Center, 23281 La Palma Ave, Yorba Linda, CA 92887. (949) 799-3387. Serving Tustin, California. Ballpark range: $1,500 to $20,000. Posted rates at https://ocrv.biz/prices/ ## Which of the four fiberglass failures are you looking at? Stand at a low angle to the panel with the sun behind you and look along the surface rather than at it. That single trick separates most of these. **Gelcoat spider cracking**: Fine hairline cracks radiating in a web, usually near a fastener, a corner or a high flex area. The panel still sounds solid and feels flat. Cosmetic, and repairable by grinding out, filling and refinishing. **Impact fracture**: A star or bullseye pattern with a clear center point, often with the panel pushed slightly inward. Structural, because the laminate behind the gelcoat is broken through and moisture now has a path. **Seam or cap separation**: A line opening at a joint, most often where a front or rear cap meets the sidewall or at a roof to sidewall transition. Sealant looks stretched or split. This is where water gets in on most coaches. **Delamination**: The skin has released from the core behind it. In raking light the panel looks wavy or bubbled. Tap it with a knuckle and the tone changes from a dull thud to a hollow rattle. Not cosmetic under any circumstances. The tap test is the one to run before making a phone call. A hollow area larger than a dinner plate has already spread. ## What actually causes delamination on an RV sidewall? Water, heat and time, in that order. An RV sidewall is a bonded sandwich: an outer fiberglass skin, often a Filon sheet on lower cost units or a molded gelcoat panel on caps, then luan plywood, then block foam insulation, then the aluminum or steel frame. The factory presses that stack together with adhesive. Every layer bond in that stack is a potential failure point. Water reaches the luan through a failed window seal, a clearance light gasket, a marker light screw, an awning rail fastener or an open cap seam. The luan swells, the adhesive bond releases, and the skin no longer has anything holding it flat. Heat accelerates it, which is why a coach parked with one side facing afternoon sun delaminates on that side first. Two things follow from that. Delamination is a symptom of a leak, so repairing the panel without finding the entry point buys a couple of seasons at most. And a small hollow spot rarely stays small, because once the skin can move, every heat cycle works the adjacent bond loose. ## How is a delaminated panel actually repaired? Two ways, and the choice is driven by how much of the core is wet. - **Injection.** On a contained area with dry core, structural adhesive is injected through small ports and the panel is pressed flat with vacuum or clamping boards until cure. Fast, far less invasive, and only valid when the luan behind it is sound. - **Skin removal and rebuild.** The outer skin comes off, wet luan is cut out and replaced, foam is renewed where crushed, the framing is inspected for corrosion, and the stack is rebonded and refinished. This is the real repair when the core is gone. Delamination work runs $1,500 to $20,000 and 10 to 100 labor hours at $210 per hour, and the spread reflects exactly that decision. Aluminum skin and sidewall replacement, the equivalent job on a stick and tin trailer, runs $2,500 to $25,000. Full front or rear cap replacement runs $4,500 to $25,000. All from the [posted rate card](/prices/). Resin selection, lay up schedule and gelcoat matching are covered in depth on the [fiberglass repair service page](/services/fiberglass-repair/). ## When is it worth repairing and when is it not? Repair is straightforward when the affected area is contained, the core is dry and the vehicle has years left in it. It gets harder to justify when delamination has spread across more than one panel on a unit already past its useful life, since the labor does not scale down with the value of the vehicle. The honest test we use at the estimating desk: how many square feet sound hollow, is the floor soft anywhere, and does the roof seam above the affected wall still hold sealant. If two of those three are bad, the number gets large fast and the conversation should include [repair or replace](/insurance/repair-vs-replace/) before anyone authorizes work. If a claim is involved, note that carriers frequently classify delamination as a maintenance issue rather than sudden damage, which changes coverage entirely. That distinction is worth understanding before the adjuster raises it. Send close photographs plus one raking light shot through the [quote request form](/contact/). ## Questions ### Can you repair fiberglass without repainting the whole side? Usually yes. The repair is refinished and then blended into the adjacent surface, with the transition planned to land at a body line or a decal edge where the eye stops. Color match blending runs $500 to $5,000. On a badly oxidized older finish the blend gets harder, and at that point refinishing the full panel gives a better result. ### Is a hollow sounding spot always delamination? Not always. Some panels have a void from the factory bond that never spread and never will, and some hollow tone comes from insulation shrinkage behind an otherwise sound skin. What separates them is movement: press the area firmly, and if the skin flexes independently of the wall, the bond has released. ### My front cap has a crack where it meets the roof. Is that serious? Treat it as serious until proven otherwise. The cap to roof transition is the highest stress joint on a motorhome and the most common water entry point. Water that gets in there travels along the roof framing and shows up as a stain several feet away, so the visible damage is rarely at the leak. ### How long does fiberglass work take? Cure schedules dictate the calendar more than labor does. A contained cap crack repair may be four labor hours spread over three days because each fill, cure and sand cycle has to complete before the next begins. A full skin removal and core rebuild runs into the tens of hours plus refinish time. ### Do you work on cracked gelcoat on a fifth wheel front cap? Yes, and it is one of the most common jobs on towables. Fifth wheel front caps flex constantly in transit and crack at the radius corners and around the front window. Repair means grinding the crack open to sound laminate, rebuilding it, then refinishing so the pattern does not telegraph back through. ## Related - [Fiberglass Repair](https://ocrv.biz/services/fiberglass-repair/) - [Body Repair](https://ocrv.biz/services/body-repair/) - [Roof Repair and Replacement](https://ocrv.biz/services/roof-repair/) - [Repair or Replace, How the Decision Gets Made](https://ocrv.biz/insurance/repair-vs-replace/) - [Prices and Posted Rates](https://ocrv.biz/prices/) - [Campers and Trailers](https://ocrv.biz/vehicles/campers-trailers/)