How to Repair Roof Flashing Against a Brick Wall

Step-Flashing Repair

• 1

  Bend the counterflashing covering the damaged step flashing up, exposing the step flashing’s vertical side.

• 2

  Pull back any shingles covering the step flashing’s horizontal side.

• 3

  Pry the step flashing away from the roof and wall with a pry bar. If the step flashing is secured to the roof with nails, pry the nails out of the flashing before prying the flashing off the roof.

• 4

  Cut a new step-flashing piece with metal shears. Use the old flashing piece as a template.

• 5

  Apply roofing cement with a caulking gun to the bottom of both sides of the new flashing piece.

• 6

  Press the flashing onto the roof and against the brick.

• 7

  Apply roofing cement over the flashing’s edges.

• 8

  Lower any roofing shingles onto the step flashing’s horizontal side.

• 9

  Bend the counterflashing within the wall over the step flashing’s vertical side.

Counterflashing Repair

• 10

  Chip away the mortar from the joint between the bricks with a chisel. Driving the chisel into the mortar joint with a hammer removes the mortar.

• 11

  Pull the counterflashing out of the mortar joint.

• 12

  Cut a new counterflashing piece with metal shears. Use the old flashing piece as a template.

• 13

  Insert the new flashing piece into the mortar joint within the wall.

• 14

  Fill the mortar joint with premixed mortar using a caulking gun.