TWO PANEL DOORS
The typical sliding glass door has two panels. The one that moves is the "primary door" and the fixed door is known as the "stationary door". Please refer to Figure 1 below. If you are standing outside of your door and the stationary door is on the outside track, you may need to secure it as well. In diagram A, the primary door is on the right side and the stationary door is on the left. Likewise, in diagram B, the primary door is on the left side and the stationary door is on the right.
In both of these two arrangements, the stationary door is
on the outside and may be vulnerable to burglars.
Today, most modern sliding glass doors have some sort of hardware installed to keep the stationary door from being moved, slid open or lifted up off of its tracks. Please inspect your sliding glass door to see if any such hardware is installed.
If you door does not have any such hardware installed, we recommend installing a Standard Version SliderLock on both of the doors as added security measure. This will insure that neither door can be lifted off of its tracks. The location of the locks is indicated by a red X.
PLEASE NOTE: If you are on the outside of your door and the stationary door is on the INSIDE track, you DO NOT need the second SliderLock.