We recommend purchasing stainless steel or galvanized L brackets at your local hardware store to install your privacy screen to a pre-existing concrete or wood surface. Screw one side of the bracket to your privacy screen post and the other side to the surface. We recommend doing this for all posts. Remember this screen is not designed to be used as a fence. It needs to be installed at a right angle and not in a straight line otherwise it will be vulnerable to wind damage.
This customer surface-mounted two ZP19014 Premium Privacy Screens on their concrete surface using L-brackets on the inside.