41.   It is designed to prevent water dammed by an ice dam from backing up under the shingles and into the house.

42.   It is these houses that are most likely to get ice dams.

43.   It may be a sign of an ice dam, but at least the water is staying outside, not leaking into the house.

44.   Lake Missoula spilled out onto the lowlands in a rumbling, frothy flood peppered by chunks of the shattered ice dam.

45.   Keeping your gutters clean and flowing freely can also help prevent ice dams.

46.   Moreover, even though much of the ice is now melted, ice dams could quickly return with another snowfall.

47.   Most insurance policies cover backups from ice dams, insurers say.

48.   My roofer said my shield is over the drip edge, which is wrong, and the cause of the leaks from ice dams.

49.   Not a lot right away, except maybe scrape off as much of the snow as possible, because the snow is the primary cause of the ice dam.