What’s an Ice Dam, Anyway?

An ice dam occurs when there’s a disparity in the temperature of your roof that causes snow and ice to melt off of the main portion of the deck, then refreeze at the eaves. This results in a sort of hump that slows or prevents further run-off of that same type of melt — it’s a dam literally created out of ice. It may cover the edge of your roof or spill over into your gutters, but either way it’s not good news. You might also notice icicles forming, this is a sign you absolutely need to get in gear and figure out what’s going on upstairs.