base flashing
1. The flashing provided by upturned edges of a watertight membrane on a roof. 2. Any metal or composition flashing at the joint […]
1. The flashing provided by upturned edges of a watertight membrane on a roof. 2. Any metal or composition flashing at the joint […]
A flattened arch whose ellipse-like shape is determined by three arcs that are interconnected, each arc being drawn from a different center