Add Yahoo as a preferred source to see more of our stories on Google. Roof vent flashing is a necessary component of your roof structure. It prevents the accumulation of moisture and rain in and ...

Asphalt, wood shakes, slate and other overlapped roofings are fine until they meet an obstruction. Up against a dormer, a vent pipe, a chimney, they need flashing — a patchwork of metal sheets, and ...