TLDR
Four decisions that determine the cost of everything downstream. Roof material and shop type are the two owners get wrong most.
The key RV repair comparisons are repair versus replacement thresholds, body shop versus dealer versus specialist, roof membrane material choice, and paint versus wrap for branding and colour change.
Specialist vs Body Shop vs Dealer
| Capability | RV specialist | Automotive body shop | RV dealer service |
|---|---|---|---|
| Booth for full length coaches | Yes | No | Sometimes |
| Structural measurement | Yes | For cars | Rarely |
| Fiberglass and delamination | Yes | No | Sometimes |
| House systems | Yes | No | Yes |
| Paint in house | Yes | Yes | Usually subcontracted |
| Custom fabrication | Yes | Rarely | No |
| Handles modified vehicles | Yes | Rarely | Rarely |
| Typical turnaround, multi discipline | Fastest | Not applicable | Slowest |
The pattern is consistent: a body shop is excellent at the half of the job it can do, a dealer is excellent at the other half, and a job needing both spends weeks in transit between them.
Roof Membrane Materials
| Material | Typical life | Cost | Best for |
|---|---|---|---|
| EPDM rubber | 10 to 15 years | Lowest | Budget replacement, chalks as it ages |
| TPO | 15 to 20 years | Moderate | Most owners, best balance of cost and durability |
| Fiberglass | 20 plus years | Highest | Coaches that shipped with it, best appearance |
| Aluminum | 20 plus years | High | Airstream and traditional aluminum construction |
Whatever the material, penetration sealant is what actually fails. A twenty year membrane over unmaintained sealant leaks in year three.
Repair vs Replace Thresholds
- Roof: Repair while the membrane is intact and only sealant has failed. Replace once cracking spreads across the field or decking has softened.
- Fiberglass panel: Repair below roughly a third of the panel. Replace above that, or where it has already been repaired twice.
- Slide seals: Always replace rather than treat. A hardened seal that no longer compresses cannot be restored.
- Generator: Rebuild below the compression and hours threshold. Replace above it, where a new unit costs less across five years.
- Absorption refrigerator: Repair the LP side, the board, or the igniter. Replace when the cooling unit itself has failed, and consider a 12V compressor unit at that point.
Paint vs Wrap
| Paint | Vinyl wrap | |
|---|---|---|
| Upfront cost | Higher | Lower |
| Lifespan | 10 plus years | 5 to 7 years |
| Complex surfaces | Better | Difficult on deep contours |
| Reversible | No | Yes |
| Fleet consistency | Excellent with formula on file | Excellent, printed to spec |
| Repairable in sections | Yes, with blending | Yes, panel by panel |