I have found different brands of roof vents are better then others. I had the 2004 Sunline warrenty roof vent issue. The steel flaange rusted in less then 1 year. And the dome was shot too. Bad batch of roof vents for sure.
On my lastest TT, I installed Vent Line and I put 303 protectant on it inside and out before installing. The Sun eats these things alive.
After purchsing my VentLines, I saw Camco makes one with a lifetime warranty.
The type of plastic is the issue. The Maxx Airs are made from real good stuff and hold up well, as does most AC covers. They are all on the roof in the same sunlight, so why do these last longer then the vent?? The type of plastic and what is in it to fight the UV rays.
I do however even 303 spray the Maxx Airs.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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