Determine how you plan to finish the corner as this will dictate the length of the corner. Corners can be capped with ledger or ledger corners. For a ledger finish, the top of the corner (the end with the lip on top) should be 1 ⅝” below the top of the flange on the top panel.
Step 1
Place corner so that the bottom of the corner will be flush with the bottom of the bottom panel. Screw thru the recessed channel at the top, bottom and middle of each side of the corner using at least a 4 ½” screw. Adhesive maybe applied to the blocks on the back side of the corner, if appropriate for the installation.
Step 2
If more than one length of outside corner is required, stack the corners by locking the male end at the top of the corner to the female end on the bottom of the corner.