Why exterior roof mildew along lines
I climbed up onto the roof of our 2014 KZ Spree trailer today and noticed mildew (or mold...I never know which is which) running along straight lines across the roof. I assume this is where the rafter...
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It's where the aluminum frame is. It sweats in the morning in the high humidity. Ever notice vertical sweat lines on your sides in the morning?
My roof has the same black lines. It's telling me to step here.
My roof has the same black lines. It's telling me to step here.
