How To Install Stone Veneer Around Windows

Apply a thick zigzag bead of silicone adhesive on the flashing tape installed on the sheathing above the window. The sheathing is the plywood boards that form the outer wall of the house.

Press the metal cap flashing against the flashing tape with the bottom edge of the flashing directly against the top of the window.

Nail a metal weep screed to the wall on top of the metal cap flashing. This provides an extra layer of protection against moisture while guiding the water away from the window.

Begin installing the veneer on the wall, beginning at the bottom and working toward the roof.

Measure the distance between the last piece of veneer and the edge of the window. Mark that distance on the back of the veneer.

Cut with an electric grinder into the back edge of the veneer along the line you marked. Go about halfway through the veneer.

Lay the veneer face-down on a table or workbench, positioned so the line you cut with the grinder lines up with the edge of the table.

Remove excess veneer by carefully tapping with a brick hammer on the part that extends past the edge of the table.

Brush water onto the back side of the veneer to prevent it from drawing moisture out of the mortar. This prevents the mortar from cracking.

Spread a half-inch of mortar onto the back of the veneer and the side of the wall where you're installing it. Press the veneer into position on the wall.

Repeat this process to install the stone veneer around the rest of the window.