Icicles
Just because you have icicles doesn't mean you have ice dams behind them. It depends on the pitch of the roof or, if you have gutters, they're solid with ice but were installed correctly because the water is flowing over the front. If the pitch of the roof is steep enough the melting water is moving, a good thing, making icicles. If you don't have much pitch on your roof there is a berm behind it. You won't know until you poke with a roof rake and see what is up the roof behind the icicles.
DC
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