Almost ice dam time again
Although there are many areas in the South, Southeast, and Southwest that don’t have the problem, the rest of us have to worry about ice dams on our roofs. Most steep slope roofing products require a special installation technique on the eaves of the roof to prevent the consequences of ice damming.
DaVinci lightweight roofing materials require an ice barrier consisting of a self adhering polymer modified bitumen sheet be applied to a point at least 24″ inside the exterior wall line of the building in areas where the average daily temperature in January is 25 degrees F or anyplace where ice buildup is probable.