Double-hung windows are a popular type of window found in many homes. As the name suggests, this type of window has an upper and lower sash that both slide up and down vertically in separate tracks. This allows you to open the window from either the top or the bottom. While the sliding functionality of double-hung windows is very convenient for ventilation, it can also make them prone to accidental opening. There are several methods you can use to prevent double-hung windows from being opened unintentionally.
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Why Would You Want to Prevent a Double-Hung Window From Opening?
There are a few key reasons why you may want to prevent a double-hung window from being opened:
– Child safety – If you have young children in your home, you likely want to prevent access to open windows to avoid potential falls. Locking double-hung windows can help childproof your home.
– Pet safety – Pets can accidentally paw windows open and potentially escape or fall out. Locking Mechanisms can protect curious pets.
– Security – Locked windows are more secure against intruders attempting to force them open from the outside.
– Energy efficiency – Sealing windows helps insulate your home better and prevents cool air from escaping in summer or warm air in winter.
– Noise reduction – Locking windows closed can dampen outside noise from traffic, construction, noisy neighbors, etc.
– Storm protection – Locking windows is part of storm and hurricane proofing, preventing wind damage.
So in many homes, there are good reasons to control and restrict access to opening double-hung windows. The ideal solutions will allow you to selectively lock windows when needed.
Short-Term Solutions
Here are some simple, short-term methods to prevent double-hung windows from opening:
Use window blocks
Wooden blocks sized to fit snugly under the bottom sash or over the top sash can temporarily jam double-hung windows shut. This is quick and easy but can be a nuisance to constantly put in place and remove.
Try sash locks or sash pins
Sash locks are devices that bolt through both window sashes to prevent either one from sliding. Sash pins work similarly but don’t fully penetrate through both sashes. These provide a quick temporary lock but can damage window frames if left in place too long.
Use sash jammers
Sash jammers are devices that wedge into the window tracks at the top or bottom to create friction and prevent the sashes from sliding. These are easy to install but may not prevent determined opening efforts.
Apply zip ties
Securing zip ties around both window sashes can prevent them from sliding. But this method is unsightly and zip ties may need to be cut for access.
Try sash chain locks
Sash chain locks allow you to limit how far the bottom and top sashes open by adjusting the length of a chain connecting the two. This doesn’t fully prevent opening but limits accessibility.
Wedge objects underneath
Placing angled objects like yardsticks underneath the bottom window sash can make it hard to slide open. But this method is not foolproof.
Long-Term Solutions
For a more permanent solution, install window hardware designed to control double-hung windows:
Install sash locks
Sash locks come in many varieties from simple latching mechanisms to ones with keyed locks. These allow selective locking of the upper and/or lower sash.
Use security bars
Bars that screw into the window tracks securely prevent forced entry and accidental opening. But these can make windows look jail-like.
Install window guards
Mesh window guards screw into the tracks and prevent window opening more than a few inches. They allow partial ventilation but prevent full access.
Replace with non-opening windows
Converting to fixed non-opening windows is the only surefire way to permanently seal windows shut. But this eliminates all ventilation capability.
Use smart locks
Newer electronic, keypad, and WiFi enabled locks allow remote control and scheduling of window locking. But these come at a higher cost.
Child Safety Solutions
Special attention should be paid to securing windows in homes with small children:
Use child safety window locks
Child locks allow windows to open only a few inches for ventilation but block full access. This prevents kids from falling out.
Install window opening control devices
These devices limit maximum opening size to under 4 inches, preventing child egress. They can still allow some ventilation.
Consider window guards
Properly installed window guards no more than 4 inches apart can prevent children from falling out while allowing partial opening.
Use smart technology
Internet connected smart locks allow remote control of window opening. This lets parents restrict window opening from anywhere.
Educate children on window safety
Teaching kids not to play near windows or open them without permission is part of a common-sense defense. Supervision is still important though.
Proper precautions can help make windows safe. But windows within a child’s reach should be secured with tested child safety devices.
Conclusion
Double-hung windows are designed for maximum ventilation by opening from either the top or bottom sash. But sometimes preventing the window from opening is desired for safety, security, energy efficiency or other reasons. There are many creative quick fixes, but for reliable long-term solutions your best bet is installing high quality window locking hardware or safety devices tailored to your specific needs. Carefully research and evaluate any safety devices to ensure they are independently tested and meet current standards for child window safety. With the right equipment you can selectively restrict window opening while still allowing fresh air when needed.
| Solution | Pros | Cons |
|---|---|---|
| Window blocks | Quick and simple to install | Need to insert and remove frequently |
| Sash locks and pins | Very secure temporary lock | Can damage window long-term |
| Sash jammers | Easy to insert when needed | Not foolproof |
| Zip ties | Prevents all movement | Need to cut to open window |
| Sash chain locks | Limits opening | Doesn’t fully prevent opening |
| Wedge objects | Quick temporary solution | Can be worked around |
| Permanent sash locks | Allow selective locking | Requires hardware installation |
| Security bars | Very secure | Not aesthetically pleasing |
| Window guards | Allow some ventilation | Partial access still allowed |
| Smart locks | Convenient remote access | Higher cost than manual locks |
Parental supervision, proper education and window hardware suited to a home’s needs are all part of a safe window security strategy. For homes with young kids, tested and properly installed child window locks and guards are a must. With the right mix of precautions, double-hung windows can be selectively secured while still allowing fresh air when desired.