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 ...

Loose Step Flashing Step flashing prevents water from seeping into walls where the roof intersects. If it rusts or loosens, water can bypass this barrier and cause damage inside your home. Ensure all ...