Double hung windows are popular for their versatility and classic style, allowing both the top and bottom sashes to move. However, their design can sometimes make them more vulnerable to break-ins or accidental openings. Learning how to secure double hung windows properly is essential for protecting your home, improving energy efficiency, and maintaining peace of mind.

1. Check and Maintain Window Locks

The first step in securing double hung windows is ensuring that the built-in sash locks are functioning correctly. These locks hold the upper and lower sashes together when the window is closed, preventing unwanted entry.

• Inspect regularly for signs of rust or damage.
  
  

• Upgrade to keyed sash locks for extra security.
  
  

• Tighten screws or replace worn components as needed.

2. Install Window Pin Locks

Window pin locks add a physical barrier that prevents the sashes from moving even if the latch is compromised. They are simple, inexpensive, and effective.

• Drill a small hole through both sashes and insert a removable metal pin.
  
  

• For ventilation, insert the pin only partially to keep the window open a few inches without sacrificing safety.

3. Add Reinforced Window Stops

Window stops limit how far a sash can be opened, keeping intruders out while allowing airflow.

• Use adjustable stops that can be removed or repositioned as needed.
  
  

• Choose rubber or vinyl models to prevent scratching the frame.

4. Apply Security Film or Window Sensors

Modern security solutions combine technology and protection.

• Security film strengthens the glass, making it harder to shatter.
  
  

• Window sensors connect to your home security system and send alerts when the window is opened or broken.

5. Reinforce the Window Frame

Over time, wood or vinyl frames can weaken, creating gaps that compromise security.

• Re-caulk around the edges to seal cracks.
  
  

• Replace damaged weatherstripping.
  
  

• Consider upgrading to reinforced vinyl or fiberglass frames for enhanced durability.

6. Consider Secondary Barriers

For areas requiring maximum protection, install interior window bars or folding security grilles. These act as a final defense against forced entry without affecting the aesthetic appeal of your home.

Conclusion

Knowing how to secure double hung windows involves more than just locking them — it’s about creating multiple layers of protection. From upgrading locks and stops to integrating smart sensors, these simple steps can make your home significantly safer. Regular maintenance and the right security products will help ensure your windows remain both functional and secure for years to come. For more information or assistance ordering replacement hardware, Contact Us Today! The WHD Team will be happy to help you.