Hi. I looked up at my chimney today (25 F outside) and saw these ice balls by the chimney on the flashing. I’m new to the house this winter, and the chimney could be repointed and the chimney cap definitely is rusting a little. But I have no idea what this is.
We have a 15 year old furnace (just serviced) and new hot water heater, if that helps. It hasn’t rained hear in a week
Any help? Thanks in advance.