Icicles sure do look purty in the winter but unfortunately, more often than not, they indicate the incipient arrival of an ice dam--hazard to roof and interior alike.

Here then, a ice dam primer from Energy Star.  The house painters here at Catchlight are happy to consult with you on any of your exterior and interior needs related to ice dam prevention, mitigation, or damage--email at info@catchlightpainting.com with "Ice Dam" in the subject heading, or simply call at 617-734-1696.