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  1. 06-29-2022, 09:10 PM #1
    Hitsman3
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    block spots on caulking

    Got up on roof tonight and washed it & noticed black spots on caulking. Is it mold? Anything I need to do about it? Trailer is always under our rv cover when not camping & I clean the roof 3-4 times a year. First time I have seen it.Click image for larger version.  Name: roof 2.jpg  Views: 16  Size: 93.1 KB  ID: 41524Click image for larger version.  Name: roof 1.jpg  Views: 16  Size: 97.4 KB  ID: 41525Click image for larger version.  Name: roof 3.jpg  Views: 17  Size: 92.5 KB  ID: 41526
    Jason & Jamie
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  2. 06-30-2022, 06:31 AM #2
    WhittleBurner
    WhittleBurner is online now
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    Looks like a collection of dirt[ and oxidation. Keep up on your roof cleaning also check caulking for signs of breaking down
    Last edited by WhittleBurner; 06-30-2022 at 07:07 PM.
    Marcy & Gary
    2014 Grand Design - Reflection 303RLS
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  3. 06-30-2022, 06:36 AM #3
    stroguy
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    I agree. Looks like staining, same as our roof. Lot of dust can collect in low spots or pools on the caulk and make that blackening. I didn’t like mine the first time it started but I don’t think it is damaging. Keep washing and as said, check for caulk breakdown. I know my ladder roots in the roof seem to be a weak point. I am waiting for my Etrnabond tape and I will do a recaulk and tape job.
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  4. 07-07-2022, 07:41 PM #4
    Redapple63
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    Agreed with the others. It gets worrysomev with you start to see little pinholes.

    Bill
    2019 GMC 3500 SRW Sierra Denali Duramax
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