Counterflashing – Formed metal or elastomeric sheeting secured on or into a wall, curb, pipe, rooftop unit, or other surface to cover and protect the upper edge of a base flashing and its associated fasteners. ... Your rain boots are the base flashing, and your pant legs are the counterflashing.

What does counter flashing mean?

: a strip of sheet metal in the form of an inverted L built into a vertical wall of masonry and bent down over the flashing to make it watertight.

What is the difference between flashing and counter flashing?

The base flashing (or apron flashing) is the bottom piece. Counter-flashing: Placed opposite to base flashing, or above base flashing, counter-flashing completes the two-part team. Step flashing: Step flashing is a rectangular piece of flashing bent 90 degrees in the center. It is used for roof to wall flashing.