I’m completely baffled.
I’ve got what looks like a green ice damn above my gutters creating green icicles on my house. I’ve attached two photos: one long shot and one close up. In fact, the ice is getting greener and what looks like it started on one side of the gutter now is present all across the gutter. I also feel like there is a lot of it, probably a couple of inches thick running 40 feet or so.
I have a gabled roof and the front has clear icicles, but the back is dark, green. None of my neighbors have green icicles. The roof has two chimneys, a vent stack, several vents, and a roof vent. The only thing that has changed this year was I installed gutter guards to block the leaves this summers.
I just have no idea why the ice is green and what is causing it?