How to Measure
Measure the depth of the window frame where the end posts will be attached (inside right and left sides of window frame). *If there is a cranking device, shades, blinds, etc. in the frame that may interfere with the guard, or If the depth of the frame is less than ¾", the guard will need to be installed on the outside of the window frame (on the molding or wall around the window). The end posts are ¾" wide and need at least that much space for installation. Please note, the end posts need to be screwed into solid material or stud for proper operation.
After determining where the guard will be attached (inside of window frame or molding/wall outside frame), measure the height of that area. This will determine the height of the guard required for your window.
Measure the width of the window opening. This will determine the style of the guard you will need. The guard is available with 3, 4, and 5 bars. We recommend using multiple guards for casement windows if there are multiple panes that open.
If the window opening exceeds the specified "maximum opening" size, more than one guard will be required to cover the window.
Special note about casement windows: If there is a cranking device in the window, the guard may not fit around the handle. Or the handle may not operate properly. Guards may be used horizontally (sliding bars are horizontal). If you are considering this option, please refer to the instructions for single- and double-hung windows to determine the model number(s). Reminder, entire height of window will need to be covered as well. Refer to the section on using multiple guards. Another option is to replace the handle with knobs or an alternative handle. Check with your local hardware store for a suitable substitution.
For more detailed measuring instructions and window guard model reference, please consult the Casement Window Measuring Guide.
Window Height: 14-17 inches
Maximum opening: 21 ½ inches
Maximum opening: 26 inches
Window Height: 17-23 inches
Maximum opening: 17 ¼ inches
Maximum opening: 21 ½ inches
Maximum opening: 26 inches
Window Height: 23-35 inches
Maximum opening: 17 ¼ inches
Maximum opening: 21 ½ inches
Maximum opening: 26 inches
Window Height: 35-58 inches
Maximum opening: 17 ¼ inches
Maximum opening: 21 ½ inches
Maximum opening: 26 inches
Window Height: 58-90 inches
Maximum opening: 17 ¼ inches
Maximum opening: 21 ½ inches
Maximum opening: 26 inches
Window Height: 90-120 inches
Maximum opening: 17 ¼ inches
Maximum opening: 21 ½ inches
Maximum opening: 26 inches