UV Damage Is Real — and It's Invisible Until It's Too Late
Most RV owners worry about rocks. But the sun is doing damage to your windshield every day — you just can't see it until the glass starts to fail.
How UV Degrades RV Glass
RV windshields are laminated safety glass: two layers of glass with a PVB (polyvinyl butyral) interlayer bonded between them. The PVB is what holds the glass together on impact and provides structural integrity.
UV radiation breaks down the PVB interlayer over time through a process called photodegradation. Here's what happens:
- Year 1–3: UV begins breaking molecular bonds in the PVB. No visible changes yet.
- Year 3–5: The PVB starts to yellow and haze, especially at the edges. You might notice a slight discoloration.
- Year 5+: Delamination begins — the PVB separates from the glass, creating cloudy spots or bubbles. The glass is now structurally weakened and more likely to crack from impacts that it previously would have absorbed.
UV Also Damages Coatings
Many RV windshields have specialized coatings: anti-reflective, hydrophobic (rain-repellent), or tinted layers. UV degrades all of these over time, reducing their effectiveness and eventually causing peeling or crazing (fine surface cracks).
The Storage Problem
RVs spend most of their life parked — in driveways, storage lots, or campgrounds. That's 300+ days per year of direct sun exposure. Even in northern climates, cumulative UV exposure over years of storage takes its toll.
How to Protect Against UV Damage
- Magnetic windshield cover: Blocks 100% of UV from reaching the glass. FIT Protection covers use UV-stabilized marine-grade vinyl that won't degrade in sun. The cover protects the glass while the vinyl protects itself.
- Covered storage: Effective but expensive ($100–$300/month for covered RV storage).
- Windshield sunshade: Interior shades block some UV but don't protect the outer surface or coatings.
The Bottom Line
UV damage is cumulative and irreversible. Once the PVB interlayer starts degrading, the only fix is windshield replacement ($800–$3,500+). A magnetic cover costs a fraction of that and prevents the damage from starting.
FIT Protection covers block UV, absorb rock impacts, and install in minutes. They protect your windshield during towing and storage — the two times your glass is most vulnerable.
Find your RV model and stop UV damage before it starts.
