View Full Version : Roof spots what can be done?

03-11-2016, 12:17 PM

Cleaning my roof yesterday, Dirt and filth wash away easily with Dawn and soft bristle brush. Spots which cover 99% of roof membrane wouldn't come off or even lighten, even with scrubbing by hand.
Anyone have any knowledge of what caused the spots and what if anything I can or should do about the spots?
Thanks, Dave

03-11-2016, 12:40 PM
Could be tree sap or mold...Who cares? The harder you scrub the more of the wear layer you remove from the rubber fabric. Leave it alone like I do. My roof gets washed every time it rains...Nobody sees it or cares...Don

03-11-2016, 12:57 PM
Exactly, I didn't want to rub a hole through the roof material so I didn't rub too hard. If its just sap stains I can live with that. Just wondering if there was anything I could or should do. Everything here in Georgia gets covered in a black mold when left outside, so I washed the dirt and mold off.

03-11-2016, 03:27 PM
I usually give my roof a mild cleaning and treat with UV protectant. Same with the awning.
Living at 5000', there tends to be strong UV.