black strips on roof

[riven1950]

Hey,

Our 2019 2500RL GD has been in storage for almost a year. We just brought it home in preparation for a trip. I noticed the roof is in decent shape, however there are strips that are darker. I guess this is where the roof trusses are?

Anyone familiar with this? Cause for dark strips?

No trees where it was stored.

Thinking of washing the roof. What should I use?

Thanks,
TR

[FOWLERGK]

If you ever notice in the morning when dew moisture is on the trailer. You can see the sidewall structural supports on the sides of the trailer and if on the roof, you can see same. My thinking on your issue. Sitting for a year and having moisture sitting ontop of the roof supports. This created the environment for mildew to accumulate. See if it washes off and monitor.

When i look out my second story window of my house. I see same support areas wet from dew that eventually drys up. Plus my trailer is on the move with use.

[Houndbb]

Hey,

Our 2019 2500RL GD has been in storage for almost a year. We just brought it home in preparation for a trip. I noticed the roof is in decent shape, however there are strips that are darker. I guess this is where the roof trusses are?

Anyone familiar with this? Cause for dark strips?

No trees where it was stored.

Thinking of washing the roof. What should I use?

Thanks,
TR

https://www.mygrandrv.com/forum/show...083#post188083

Probably everything you’d want to know!
N