A double-hung window consists of a movable top and bottom sash. The upper sash can lower while the lower sash raises and both sashes can tilt out of the jamb and into the room for cleaning. The spring located inside the jamb can become loose and allow the lower sash to slip closed. When the spring is too tight, it becomes difficult to raise the lower sash. Adjusting the spring on a double-hung window returns the sash to its proper working condition.
Rotate the sash lock on top of the sash to unlock it. Raise the sash to open the window approximately 4 to 6 inches.
Release the sash from the window jambs hidden by the casing surrounding the window. The way you release the sash from the jamb depends on the manufacturer of your double-hung window. Some windows have finger latches on each side of the casing; pull these latches toward the center of the casing while you pull the top of the sash from the jamb. Other models use a tilt-lever located in the sash lock base; push in on the lever as you pull the sash toward you.
Find the adjustment screws and springs located inside the jamb tracks toward the bottom of the sill. Use a flathead screwdriver to turn the screw clockwise to increase the spring tension, or turn the screw counterclockwise to loosen the tension on the spring.
Tilt the sash back into its normal operating position inside the jamb. Attempt to raise or lower the sash. Repeat the adjustment steps until you are satisfied with how the sash opens and closes.
Things You Will Need
- Flathead screwdriver