Icicles hanging from your gutters may give your home a cozy, winter wonderland vibe, but they also indicate a problem with your home’s performance. Left untreated, these “beautiful” icicles and ice dams can damage your home and lead to costly repairs – not to mention the fact that they can also endanger anyone standing below. Icicles form when snow that has melted re-freezes as it drips toward the ground. The type of icicles to look out for are the ones hanging from your gutters. If your home isn’t insulated properly, heat will rise up through the attic, melting any snow that has accumulated on your roof. This melted snow will then trickle down to your gutters, where it re-freezes, creating ice dams and icicles.