Collision and Structural Services / In shop only
RV Fiberglass Repair in Yorba Linda
RV fiberglass repair covers gelcoat damage, structural cracking, impact holes, delamination and full panel replacement on laminated coaches. Work runs $750 to $20,000 and up at 4 to 100 labor hours, with delamination accounting for the top of that range.
Fiberglass on an RV is not a solid material, it is a laminate, and almost every expensive fiberglass problem is a bond failure rather than a material failure. The fiberglass itself is usually fine. What let go is the adhesive holding it to the substrate underneath.
That is why a crack you can cover with your thumb sometimes costs three hundred dollars and sometimes costs eleven thousand. The visible crack is not the job. The debonded area around it is.
How is an RV sidewall actually built?
From outside in: gelcoat, then a fiberglass skin, then adhesive, then a substrate which is either Azdel composite or lauan plywood, then the aluminum or wood framing, then the interior panel. Foam insulation fills the framing bays.
The adhesive bond between skin and substrate is the structural element. It is what lets a thin fiberglass skin and a light frame act as one stiff panel. Break that bond over any meaningful area and the panel loses most of its stiffness, which is why delamination is a structural problem and not a cosmetic one.
Substrate choice matters enormously for repair. Azdel is a polypropylene composite and it does not absorb water. Lauan is plywood and it does, which is why coaches built with lauan suffer far worse consequences from the same seam leak.
What causes fiberglass damage on RVs?
Impact is the obvious one and it is the least common cause of the expensive work. Far more damage comes from water and heat.
Water entering at a failed seam, a window frame, a roof penetration or a marker light wicks between skin and substrate and destroys the adhesive bond. On lauan built coaches it also rots the substrate itself. Heat cycling in Southern California sun then works the weakened bond loose over a wider area every summer.
Stress cracking is the third cause: framing that flexes more than the skin can tolerate, usually around slide openings, windows and cap seams where the panel is discontinuous.
How do you tell cosmetic damage from structural?
Tap testing and moisture metering, before anything is repaired.
A sound laminate returns a sharp, consistent tone. A debonded area returns a dull hollow tone, and the boundary between the two is audible and mappable. We map it with tape on the panel and photograph it, which is how the repair area gets defined and how a carrier gets shown why the repair is bigger than the visible crack.
Moisture metering tells you whether water is still present, which determines whether the panel has to be dried before repair. Bonding to a wet substrate guarantees the repair fails.
What Is Included
- 01Tap testing and moisture metering to map the true damage boundary
- 02Photographic documentation of the mapped area for carrier submission
- 03Drying where moisture is present, before any bonding work begins
- 04Substrate repair or replacement where it is compromised
- 05Skin repair, section replacement or full panel replacement
- 06Gelcoat or paint refinish with blend into adjacent panels
- 07Seam and penetration resealing to stop the source
Our Process and Timeline
Shop hours and calendar days are different things. These are the stages and the realistic duration of each.
- 011 day
Map the damage
Tap test and moisture meter the full panel to establish the real debonded boundary rather than the visible one.
- 021 to 5 days
Document and scope
Mapped area photographed and submitted with the estimate or supplement. Carriers approve what they can see.
- 032 to 10 days
Dry the structure
Where moisture is present the panel is opened and dried. Bonding to a wet substrate guarantees failure.
- 043 to 20 days
Repair or replace
Substrate repaired or replaced, skin sectioned or the full panel replaced depending on the mapped extent.
- 053 to 10 days
Refinish
Gelcoat or paint applied and blended into adjacent panels so there is no visible boundary.
- 061 day
Seal the source
The seam, window or penetration that let water in is resealed, otherwise the repair is on a timer.
Common Problems and How We Solve Them
A previous repair bubbled and lifted within a year.
SolutionAlmost always bonded over moisture, or the debonded boundary was never mapped so the repair stopped inside the failed area. We map and dry first.
The estimate is far bigger than the visible damage.
SolutionBecause the debonded area is far bigger than the visible damage. The tap test map and photographs show exactly why, and that is what gets a supplement approved.
The repair matches now but will it match in two years?
SolutionWe blend into adjacent panels rather than stopping at a seam, so as the coach continues to fade there is no hard line to appear.
Specific Services
Frequently Asked Questions
How much does RV fiberglass repair cost?
Cap repair runs $750 to $12,000 and up at 4 to 60 hours. Delamination runs $1,500 to $20,000 and up at 10 to 100 hours. Where a job lands depends on the mapped debond area, not the visible crack size.
Can delamination be repaired or does the wall have to be replaced?
Small isolated areas can be repaired by injection. Larger areas need the skin removed, the substrate replaced and the panel relaminated. Full panel replacement is the last resort.
Why is my repair estimate bigger than the crack?
The bond failure extends well past the visible damage. We map it with tap testing and photograph the boundary so the reason is documented rather than asserted.
Will insurance cover fiberglass delamination?
If it resulted from a covered impact or a covered water event, generally yes. Gradual delamination from a long standing seam leak is usually treated as maintenance and excluded.
How do I stop it happening again?
Reseal seams, windows and roof penetrations on a schedule rather than when they leak. Nearly every delamination job we do traces back to a seal that was overdue by years.
Vehicles We Perform This On
Related Services
We Can Help. Contact Us Today.
Bring the vehicle to our Yorba Linda facility and we will document the damage properly, work directly with your carrier, and give you a written figure built from published rates and real labor hours.
All work is performed at our Yorba Linda facility. We do not offer mobile, roadside or fleet route service.