As a dummy, why does this entire cap and ridge have moss all along house, but nowhere else?
I’m assuming it might have something to do with there being some sort of venting happening where excess moisture is aiding the process? Am I off base? On base? Inquiring minds want to know! 
Thats a ridge vent. Heat and cold meeting causes condensation. Moisture feeds moss. Moss feeds you. Lol
What he said. Also, if you are unfamiliar with rood construction, if you get water into the ridge vent it goes right on down into the insulation. Fiberglass insulation can hold a lot of water.
Thanks guys. I figured as much but being a yahoo I didn’t know for sure.
