Community Forums

jrpatterson4 · 03-16-2019, 09:35 AM

Hello, I recently purchased a FR Lexington. When it rained, some kind of white chalky "stuff" ran down from the rubber roof. It is a mess but washes off the sides
and windshield easily. There is no way to find out what it was coated with, so I'm not sure how to remove it from the roof. Do you think a good washing will take care of it? I want to be sure it's gone before I put a protective coating on it.
Thanks for reading.

Bob_C · 03-16-2019, 09:53 AM

What you're seeing is lack of care from previous owner......washing the roof often keeps the trails from happening....also gives one a chance to check the caulking....before applying a coating, make sure what kind of rubber roof you have....

Dsallach · 03-16-2019, 10:01 AM

That is most likely the roof coating oxidizing from the sun and weather. I used diluted Dawn dish soap with some hydrogen peroxide in a 5 gallon bucket. I brushed the solution on the roof with an Rv wash brush. I then rinsed it off using a pressure washer on fan pattern. I now coat the roof every 6 month with 303 aerospace, no problems since.
Hope that helps.

MSHappyCampers · 03-16-2019, 11:10 AM

Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Congrats on the new rig! Keeping the roof clean will solve most of the streaking problems. Have fun and keep her between the ditches!

Good luck, happy trails, and God bless!

GMoore · 03-16-2019, 11:58 AM

My searches find a fiberglass roof may be on your RV.
Determine, for sure what roof type you have

https://www.youtube.com/watch?v=KL5qJw397Rc

[Mod Edit]

astrnmrtom · 03-16-2019, 06:38 PM

Normal for a worn EDPM rubber roof. Eventually the white part of the coating wears off as it oxidizes and the black, base rubber starts to show through. Don't clean it or recoat it with any petroleum based products. 303 mentioned above is water based so is ok. Worse come to worse, Dicor makes a products for putting a new white coating on the roof. Not too expensive or difficult to apply. Then the roof is good as new as long as the base rubber hasn't failed.

Some people recommend diluted Simple Green for cleaning.

Gary RVRoamer · 03-17-2019, 09:20 AM

Recent year Lexingtons have a fiberglass roof, but a neglected fiberglass roof will still oxidize and chalky residue runs off. The solution is the clean thoroughly and wax it, or better yet re-paint it with a fiberglass roof paint, e.g. Dicor Fiberglass Roof Coating. That's what I did with mine.