When multi slide patio doors became popular, it did not take long until the would-be thieves exposed the vulnerability of the doors. People place jamb bars to prevent doors from being opened after the locks were collected, but thieves rarely slid open doors to gain illegal entry. The lifting of the door and the removal of everything together was faster, quieter and easier than opening locks or breaking the glass. Since then, the sliding glass door has been reinvented, adding more security features and making it more difficult for thieves to eliminate.
Replace glass on the sliding patio door with a reinforced glass with internal tempered, laminated or screen. Place an “alarm in the premises of” signature professional or sticker on the glass so that it can be seen from would-be thieves. Professionally installed alarm systems offer these to advertise your business and deter thieves. Open the sliding patio door to the end. Screw large six-inch / 1-1 / 2-inch flat head screws or self-tapping screws into the top door rail.
Install a hanging rail from the door jamb to the inner side rail of the patio sliding door. Install the saddle hardware in the interior patio door frame, aligning it to allow the end of the door jamb to rest properly on the saddle. Install an interior lock for the sliding door with the key in the lower part of the inner track for additional protection. Replace the inner lock or a lock with external key to the patio door with an interior sliding glass doors lock with spring latch.