After recently finding a lot of fallen moss on my deck, I headed to my roof to attack the infestation with a push broom and screwdriver. I've got it mostly cleaned up, and I'll hit it with a bleach solution soon, but I found a patch on my roof where most of the rock granules have been washed away.
The upper roof gutters drain down to the lower roof as pictured, and this has washed away most of the rock granules from the shingles. The roof is no more than 18 years old. Do I need to replace the section pictured here? Should I extend the gutter drain to empty directly into the lower gutter instead of dumping onto the roof below?
And lastly, I found a hole in the gasket of a vent. Does this need to be sealed? If so, do I just use roofers tar, or is there a better product?
