Windows Security

How To Secure A Double Hung Window

When it comes to securing your double hung windows, it's essential to take the necessary precautions to ensure the safety of your home. Did you know that double hung windows are one of the most common entry points for burglars? With their unique design and accessibility, they can be vulnerable if not properly secured. So, what can you do to protect your home and loved ones?

First and foremost, reinforcing the glass is crucial. By applying a shatterproof film or installing laminated glass, you can significantly reduce the chances of a break-in. Additionally, adding window locks and security pins can provide an extra layer of protection. Another effective measure is installing window security film, which not only prevents the glass from shattering but also acts as a deterrent to potential intruders. By taking these precautions, you can ensure the security and peace of mind that you and your family deserve.



How To Secure A Double Hung Window

Understanding the Importance of Securing Double Hung Windows

Securing your home is of utmost importance, and one area that requires special attention is your windows. Double hung windows are a popular choice due to their timeless design and functionality. However, they can also be vulnerable entry points for intruders if not properly secured. In this article, we will explore various methods and techniques to ensure the security of your double hung windows, providing you with peace of mind and a safer home.

1. Reinforce Window Glass

The first step in securing your double hung windows is to reinforce the glass. While a broken window can grant easy access to your home, reinforced glass is much more difficult to break. One popular option is laminated glass, which consists of two or more glass panes with a polyvinyl butyral interlayer. This interlayer holds the glass together even if it shatters, making it harder for intruders to enter. Another option is tempered glass, which is four to five times stronger than regular glass and shatters into small, relatively harmless pieces when broken.

To further strengthen the glass, you can also consider window film. Security window film is a clear adhesive film that adds an extra layer of protection to the glass. It not only makes the glass more difficult to shatter but also holds the shards in place, reducing the risk of injury from flying glass fragments. Window film can be easily applied to the interior surface of your double hung windows, providing an additional security measure.

Additionally, using a window security film can also protect your windows from damage caused by extreme weather conditions, such as hurricanes or storms. This added layer of protection can prevent the glass from breaking and help maintain the structural integrity of the window during adverse weather events.

1.1 Installing Laminated Glass

If you decide to install laminated glass on your double hung windows, it's best to consult a professional installer. They have the expertise and experience to ensure the glass is securely installed and properly sealed. It's important to note that laminated glass is thicker and heavier than regular glass, so the window frame and hardware need to be able to support the additional weight.

During the installation process, the existing glass is typically removed, and the laminated glass is cut to fit the window frame. The glass is then placed into the frame and secured using specialized adhesives. The installer will ensure a proper fit and seal to prevent any potential gaps that could compromise the security and energy efficiency of your double hung window.

Keep in mind that laminated glass may alter the appearance of your windows slightly. However, the added security benefits outweigh any aesthetic changes, and it's a small compromise for the peace of mind it brings.

1.2 Applying Window Film

Applying window film is a more accessible and cost-effective option for reinforcing the glass in your double hung windows. You can choose between clear security film or tinted film depending on your preferences and needs. Follow these steps to apply window film:

  • Clean the glass thoroughly to remove any dirt or debris.
  • Measure the dimensions of the window and cut the film accordingly, leaving a few extra inches on each side.
  • Peel off the protective backing from the film, exposing the adhesive side.
  • Starting from one corner, apply the film to the glass, smoothing it out and pressing out any bubbles as you go.
  • Trim off any excess film using a sharp utility knife.
  • Once the film is applied, use a heat gun or hairdryer to activate the adhesive, ensuring a secure bond.
  • Allow the film to dry completely before operating the window.

Window film not only enhances the security of your double hung windows but also provides other benefits such as reducing glare, protecting against UV rays, and enhancing privacy.

2. Install Window Locks

Add an extra layer of security to your double hung windows by installing window locks. Window locks prevent the sashes from being opened from the outside, making it more challenging for intruders to gain access. There are several types of window locks available:

  • Sash locks: These locks are installed on the horizontal meeting rail of the two sashes. They can be operated using a key, lever, or twist mechanism, and effectively secure both the top and bottom sashes.
  • Keyed locks: Keyed locks provide added security as they require a key to lock and unlock. They are typically installed on the bottom sash and prevent the window from being opened without the key.
  • Window pin locks: Pin locks consist of a metal pin that is inserted through a hole drilled into the upper sash and into the lower sash. They provide an additional barrier against unauthorized entry.
  • Window security bars: If you're looking for a more robust security option, window security bars are an excellent choice. These bars are installed on the interior side of the window and prevent the window from being opened while still allowing natural light to enter.

Ensure that the window locks you choose are suitable for double hung windows and compatible with your window frame material. It's recommended to install locks on both the top and bottom sashes for maximum security. Consult a professional if you're unsure about the installation process or need assistance in selecting the appropriate locks for your windows.

2.1 Sash Lock Installation

To install sash locks on your double hung windows, follow these steps:

  • Position the lock on the horizontal meeting rail of the two sashes, ensuring it aligns with the lock receiver on the opposite sash.
  • Mark the screw hole locations with a pencil or marker.
  • Drill pilot holes into the marked locations to prevent the wood from splitting when inserting the screws.
  • Secure the lock in place using screws, and ensure it clamps tightly onto the rail.
  • Test the lock by attempting to open the sashes from the outside to ensure it functions correctly.

Remember to install locks on all accessible windows in your home for comprehensive security.

2.2 Window Pin Lock Installation

To install window pin locks on your double hung windows, follow these steps:

  • Open the window and position the upper sash approximately six inches from the fully closed position.
  • Mark the location for the pin hole on the lower sash.
  • Drill a hole through the marked location, ensuring the hole diameter matches the diameter of the pin lock.
  • Close the window to align the upper and lower sashes.
  • Insert the pin lock through the hole, securing both sashes together.

Make sure the pin lock is firmly inserted into the hole and prevents the sashes from being separated. Test the lock by attempting to open the window from the outside to ensure it provides the desired level of security.

3. Reinforce Window Frames

While reinforcing the glass and installing locks are essential for securing double hung windows, it's equally important to reinforce the window frames. Weak or deteriorated frames can compromise the overall security of your windows and make them susceptible to forced entry. Here are a few ways to reinforce your window frames:

  • Repair or replace damaged frames: Inspect the window frames for any signs of damage, such as rot, cracks, or warping. Repair or replace any damaged frames to ensure their structural integrity.
  • Install metal reinforcement plates: Metal reinforcement plates are installed on the interior side of the window frame, providing additional strength and security. They help prevent the frame from being pried open or forced.
  • Apply epoxy wood filler: If you come across any small cracks or holes in the frame, fill them with epoxy wood filler to strengthen the frame and prevent further deterioration.
  • Add window security film: As mentioned earlier, window security film not only reinforces the glass but also helps hold the frame together in the event of a break-in attempt.

Regular maintenance and inspection of your window frames are essential to identify any weaknesses and address them promptly. Ensuring the structural integrity of the frames contributes to the overall security and longevity of your double hung windows.

4. Consider Window Alarms

Another effective security measure for double hung windows is the installation of window alarms. Window alarms are small devices that emit a loud sound when the window is opened or tampered with. They act as a deterrent, alerting you and your neighbors of a potential break-in.

There are different types of window alarms available, including magnetic alarms, vibration sensors, and glass break sensors. Magnetic alarms consist of two parts—the sensor and the magnet—that are attached to the window frame and the moving sash. When the sash is opened, the magnetic connection is broken, triggering the alarm. Vibration sensors and glass break sensors detect any vibration or the sound of breaking glass, activating the alarm.

Window alarms are typically battery-powered and easy to install. However, if you're not comfortable installing them yourself, you can enlist the help of a professional security system installer to ensure proper placement and functionality.

Enhancing Your Double Hung Window Security

Now that we have discussed various methods to secure your double hung windows, it's important to remember that comprehensive security involves a combination of different measures. While reinforcing the glass, installing locks, reinforcing frames, and adding window alarms significantly enhance the security of your windows, it's crucial to incorporate other security practices in your overall home security plan.

Consider integrating an alarm system, installing motion sensor lights, and reinforcing doors and other entry points for complete protection. Additionally, always maintain vigilance, secure your windows and doors whenever you leave your home, and ensure visibility from the street to deter potential intruders.

By taking proactive steps to secure your double hung windows and implementing a comprehensive home security strategy, you can minimize the risk of break-ins and enjoy a safer and more secure living environment for you and your family.


How To Secure A Double Hung Window

Securing a Double Hung Window

Double hung windows are a popular choice among homeowners due to their versatility and functionality. However, ensuring the security of these windows is crucial for the safety of your home. Here are some tips on how to secure a double hung window:

  • Install window locks: Adding window locks is an effective way to prevent unauthorized entry. These locks can be installed on both the top and bottom sashes of the window, providing added security.
  • Reinforce the glass: Consider using laminated or tempered glass on your double hung windows. These types of glass are stronger and more resistant to breaking, making it difficult for intruders to gain access.
  • Use window security film: Applying security film to the glass of your double hung window can provide an extra layer of protection. This film makes it harder to break the glass and helps to hold it together if shattered.
  • Add window sensors: Installing window sensors can enhance the security of your double hung windows. These sensors can detect when the window is opened, triggering an alarm or alerting you to any potential breaches.
  • Consider window bars or grilles: For added security, you may consider installing window bars or grilles. These physical barriers make it extremely difficult for intruders to access your home through the windows.

### Key Takeaways:
  • Install window locks for added security.
  • Use window security bars to prevent unauthorized entry.
  • Apply window film to strengthen the glass and deter break-ins.
  • Add window sensors to your existing security system for enhanced protection.
  • Consider reinforcing the window frame with security pins or screws.

Frequently Asked Questions

Securing a double hung window is essential for the safety and security of your home. Here are some commonly asked questions about securing double hung windows:

1. What are some ways to secure a double hung window?

There are several effective ways to secure a double hung window:

A. Install window locks: Window locks can be easily installed on double hung windows to prevent unauthorized opening. These locks are available in various types, such as sash locks, pin locks, and keyed locks.

B. Use window bars or grilles: Window bars or grilles add an extra layer of security to double hung windows. These can be installed on the interior or exterior of the window and act as a physical barrier against break-ins.

2. How can I reinforce the glass in a double hung window?

Reinforcing the glass in a double hung window can make it more resistant to forced entry:

A. Install window security film: Window security film is a clear adhesive film that is applied to the glass surface. It strengthens the glass and makes it more difficult to break. This film also helps hold the glass together if it does break, reducing the risk of injury from shattered glass.

B. Use laminated glass: Laminated glass consists of two or more layers of glass with a layer of plastic in between. This type of glass is highly impact-resistant and provides added security against break-ins.

3. Are window sensors effective in securing double hung windows?

Yes, window sensors can be highly effective in securing double hung windows:

A. Magnetic window sensors: These sensors consist of two parts - one attached to the window frame and the other to the sash. When the window is opened or tampered with, the magnetic connection is broken, triggering an alarm.

B. Glass break sensors: These sensors are designed to detect the sound frequency and vibration patterns of breaking glass. When the sensor detects these patterns, it triggers an alarm, alerting you to a possible break-in.

4. Can window restrictors be used to secure double hung windows?

Window restrictors are a great way to secure double hung windows while allowing for ventilation:

A. Limit opening distance: Window restrictors can be installed to limit the opening distance of the window. This prevents intruders from fully opening the window and gaining access to your home.

B. Child safety: Window restrictors are also useful for child safety, preventing young children from accidentally falling out of the window.

5. How often should I check the security of my double hung windows?

It is important to regularly check the security of your double hung windows to ensure they remain secure:

A. Monthly inspection: Conduct a monthly inspection of window locks, bars, or grilles to ensure they are functioning properly and have not been tampered with.

B. Annual maintenance: Schedule an annual maintenance check for your double hung windows to identify any potential issues and address them promptly.



Securing a double hung window is essential for keeping your home safe and preventing unwanted intruders from gaining access. By following these simple steps, you can ensure that your double hung window is properly secured:

First, check if your window has built-in locking mechanisms. If not, consider installing additional locks or security devices to reinforce the window's security. Next, keep the window closed and locked when you're not using it. This simple action can prevent intruders from easily opening the window. Additionally, reinforce the glass with window film or protective bars for added security. Lastly, consider installing a window sensor or security camera to monitor any suspicious activity near your double hung window.

Remember, taking these precautions will help protect your home and loved ones from potential break-ins. By securing your double hung window, you can have peace of mind knowing that your home is safe and protected.


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