Window Flashing Installation in Brick Veneer

Window flashing installation is required to prevent water leaks into the home. While brick homes do not usually have problems with leaking, homes using brick veneer will probably will if the flashings are not installed correctly.

Tools and Materials Needed:

  • Flexible brick flashing (Self –adhesive type)
  • Flashing sealant
  • House wrap
  • Metal pan flashing

Step 1 – Preparations

Before the installation of the flashings, it is important to cover the entire section of the wall where the window is installed with house wrap. Make sure to install the house wrap over the window openings, and the jambs, sills and the face of the framing.

Ensure that the surfaces of the window opening and around it are clean and free from dust, grease and any kind of contaminant that may interfere with the application of the flashing material.

Purchase 2 metal pan flashings with length equal to the width of the window plus 1 inch. Fit the metal pan flashing flush below the window opening. Mark the line where the bottom of the pan is situated. Remove the pan. Build the brickwork up to that line and work with the steps below before continuing. Place the pan back into position.

Step 2 – Install Flashing on Sill and Header

Measure the width of the window and cut the flashing to that length, but add 1 inch more. Do not remove the release paper at the back of the flashing yet. Fold the material lengthwise at an inward direction about 1 1/2 inches from the bottom edge to form the crease that will extend down to the wall surface. The upper portion will go inside the window opening. On the upper edge, fold it about 3/8 inch outwards to form an upward crease. The folding of the flashing will provide positive water drainage that will direct water away from the home.

Center the flashing on the window opening. Remove the release paper starting from the bottom edge and peel it up to the first crease. Affix the bottom portion to the exterior surface of the window opening to overlap the metal pan flashing. Continue peeling the release paper from the first crease to the second crease while affixing the flashing to the sill. Remove the release paper entirely. Apply sealant around the edges of the flashing material situated on the jambs and the pan flashing.

Do the same with the header, but this time the outer portion of the flashing will be affixed upwards. Do not include the second crease.

Step 3 – Install Flashing on the Jambs

Using a straight flashing with no creases, cover the exterior portions of both jambs with the flashing material. The length should overlap both the flashings on the sills and header as well as the metal pan. The edges should also be flush with the opening on the window. Seal around the edges.

Step 4 – Continue with the Installation of the Brick Veneer

Continue with the proper installation of the brick veneer. Be sure to install another metal pan flashing on top of the window header and install them properly with weep holes included.