How to Remove a Commercial Double Hung Window Sash

Double-hung commercial windows are a common choice for office buildings, retail spaces, and industrial facilities due to their durability and ease of maintenance. Whether you need to replace a damaged sash, clean the window tracks, or perform repairs, knowing how to remove a double-hung commercial window sash is essential. This guide will walk you through the process step by step.

Tools and Materials Needed:

• Flathead screwdriver

• Utility knife

• Putty knife (if needed)

• Safety gloves

• Replacement sash (if applicable)

Removing a Double-Hung Window Sash

1: Identify the Window Type

Commercial double-hung windows are typically made of aluminum, steel, or reinforced vinyl. They may have balance systems such as spiral balances, constant force balances, or block-and-tackle balances. Understanding the type of window and balance system will help with removal.

2: Unlock and Raise the Lower Sash

Start by unlocking the window and raising the lower sash a few inches. This provides access to the balance mechanisms and allows for easier sash removal.

3: Remove the Sash Stops

Sash stops are thin strips along the window frame that secure the sash in place. Use a flathead screwdriver or putty knife to gently pry them off. If the stops are secured with caulk or paint, use a utility knife to carefully score along the edges to avoid damage.

4: Disengage the Sash from the Balances

For modern commercial windows:

• Locate the tilt latches at the top corners of the sash. Press them inward to disengage the sash from the tracks.

• Tilt the sash towards you until it forms a 90-degree angle.

• Lift one side up to detach it from the pivot pins, then remove the sash completely.

For older commercial windows with counterweights:

• Remove any attached cords or chains connecting the sash to the hidden counterweights inside the frame.

• Carefully lift the sash upward and pull it out of the frame.

5: Remove the Upper Sash (If Needed)

If you need to remove the upper sash:

• Lower it a few inches.

• Remove the parting beads (the thin strips between the upper and lower sash).

• Follow the same tilting and lifting process used for the lower sash.

6: Inspect and Clean the Window Frame

With the sashes removed, clean the tracks and check for damage. This is a great time to replace worn-out balances, lubricate moving parts, or install new weatherstripping to improve efficiency.

Conclusion

To reinstall the same sash, simply reverse the steps above. If replacing the sash, ensure the new one fits properly before securing it in place. By following these steps, you can safely remove a double-hung commercial window sash for repairs, maintenance, or replacement. Keeping commercial windows in good condition ensures energy efficiency, security, and long-term durability. For more information on how to remove a double-hung window sash or to schedule a consultation for repair, Contact Us Today! The WRS Team is here to assist you.