How to Replace Window Sashes

Replacement of window sashes may be necessary if the vinyl frame of the sash is damaged or if the glass is broken. You may also find that you have a seal problem with the sash that allows condensation to build up between the insulated glass unit. Replacing the sash is much less costly than replacing the entire window. Sash replacement or repair can be handled in a couple of different ways.

Difficulty: Moderate

Instructions

Things You'll Need:

• Warranty information
• Screwdriver
• Tape measure

How to Replace Window Sashes

1. Remove the damaged sash. The removal process depends on the window. On a double-hung window you will tilt the sash in as if cleaning it. Raise one side of the window until the sash comes free. Slider window sashes are removed by opening them slightly and then lifting them straight up so that the bottom is above the retaining track. Then pull the sash toward you. Casement windows require removal of hinge brackets.

2. Look for a manufacturer's label or identification sticker on the exterior of the sash. If you are going to claim the replacement under your warranty, this number will help the manufacturer identify the proper replacement.

3. Measure the size of the sash. If you can not find the manufacturer's label, you will need to order another one from manufacturer. Also note the type of window (double hung, casement, slider) and if the sash is an interior or exterior unit. Note on double-hungs if the sash is an upper or lower and, on casements, which direction the window opens.

4. Use a local window repair or hardware facility if you do not have warranty information. Most companies can easily repair glass or vinyl damage.

5. Install the new sash in the opposite manner that you removed it. For example, tilt a slider sash so that you can insert the top of the sash in the retaining track, lift it up and place the bottom of the sash down into the lower track.

Tips & Warnings

• Prior to removing sashes, contact the manufacturer or the repair facility to understand the time of the repair. You do not want to leave your home exposed by having sashes out of the windows. The receptacles for double hung sashes spin so that the window can be tilted. You may need a large, flathead screwdriver to turn them to make it easier to re-install the sash.
• Seal failures on IG units reduce the energy efficiency of the window and cause standing condensation. It is easiest to replace the entire sash, but you also can replace just the glass or even use a clear caulk to re-seal the unit.

References

• Video on Replacing Old, Double-Hung Balancer Cords