Clock Face Step Flashing and Claps Published August 15, 2010 at 1536 × 2048 in Damariscotta Crane Day Shots ← Previous Next → Clock Face Step Flashing and Claps Using a bevel gauge, we cut each clapboard end to the curve of the clock face. On the bottom half of the circle, we used copper step flashing, and for the top half of the circle, Heritage Roofing made a single fitted half circle of copper flashing