How to Replace Roof Flashing and Counterflashing Against a Wall of Stucco

There are more than one type of flashing used in most roof installations. Some flashing protects roof valleys and roof edges; some serves around roof fittings such as vent pipes. You'll also find flashing under the eaves, where the roof meets the wall. Part of this flashing is called counterflashing. Regular flashing goes on first; then counterflashing is locked into a channel on the regular flashing; it's a form of double protection from water penetration. With stucco walls, the regular flashing goes on first, then stucco, then the counterflashing on top of the stucco to give a finished look and feel to the installation.

Safety glasses
Work gloves
Utility knife
Silicone caulk
Roof flashing
Counterflashing
Trowel
Premixed stucco
Drill

Instructions

- 1
  Purchase interlocking roof flashing and counterflashing that match the color and theme of your stucco. The counterflashing will mount to the roof flashing, not to the stucco, so you need to have interlocking flashing that will install seamlessly.
- 2
  Unhook the existing counterflashing from the roof flashing on the wall where the eaves of the house (the underside of the roof) meets the walls. Cut the stucco away from the existing roof flashing to reveal it. Use the utility knife to score the stucco, and use the handle of your trowel to crack away and remove the existing stucco.
- 3
  Remove the old flashing. Install new flashing in its place. Mount it with silicone caulking and let it dry according to the manufacturer’s recommendations, usually between 24 and 72 hours. Apply a new layer of stucco over the flashing, using the trowel, leaving the mounting brackets for the counterflashing visible. Allow the stucco to dry, then hook/mount the counterflashing on the mounts.

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