DOUBLE HUNG SASH WINDOWS
Double hung sash windows, which operate upward and downward, usually have simple crescent latches which can easily be jimmied. The most effective protection for double hung windows is a key-locking security sash lock. These should be mounted with two-inch or three-inch screws. Storm windows and screens offer some additional protection.
Pinning double hung sash windows provides an inexpensive and effective solution. Pinning can be accomplished by drilling holes at a downward angle in each top corner of the inside sash, and entering the outside sash. The window can then be secured by inserting nails through the holes which prevent it from being raised.
SLIDING, CASEMENT AND JALOUSIE (LOUVERED) WINDOWS
Protect all of your windows. Remember that second floor and basement windows are as important as first floor windows. Screens and storm windows are always an asset if properly secured.
Sliding windows, either metal or wood frame, should be protected in the same way as sliding doors. Wooden dowels laid in the track and screws set in the track to prevent the window from being lifted out are effective protective measures.
Casement windows generally open and close by means of a gear operating handle and have a locking device which secures the window to the center post. Some protection is offered by removing the crank handle from the opening mechanism when away from home. Do not leave casement windows partially opened as they can then be easily forced.
Jalousie (louvered) windows are a high security risk because individual slats are easily removed to allow access. Jalousie windows should be replaced if possible, or a protective grille or screen should be added.