
Locking windows is an essential step to securing your home and preventing theft. While windows typically come with their own locking mechanisms, these may become ineffective over time as the window ages and swells, or if paint blocks the locks. There are several ways to secure your windows, ranging from simple DIY fixes to more advanced methods. For example, you can use a plastic card to slide between the window and the frame to disengage the lock, or a paperclip to manipulate simple locks. This article will explore various methods and tools to help you lock your windows securely and effectively, ensuring your home is protected.
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What You'll Learn

Using a plastic card to unlock a window
While there are several ways to lock a window using plastic, this answer will focus on instructing someone on how to unlock a window using a plastic card.
If your window has a simple knob lock with a spring-latch or a slanted-latch, you can use a plastic card to unlock it. Start by sliding the card into the gap between the doorknob and the frame. Then, bend the card towards the doorknob. Next, tilt the end of the card back towards the frame, causing it to slip under the latch and unlock the window. If the window doesn't unlock, try leaning on it and wiggling the card back and forth quickly. You may need to try a few times, and this technique may require patience.
It is important to note that this method may not work for all windows. Windows with their own locking mechanisms, such as older wooden windows, may experience swelling that prevents the window from closing far enough for the latch to engage. In such cases, a plastic card may not be effective for unlocking.
Additionally, consider other factors that can affect the locking mechanism, such as multiple coats of paint, which can block locks from functioning properly. If you are unable to unlock the window with a plastic card, it may be necessary to install new locks or seek alternative methods, such as using a dowel or stick to secure the window.
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Drilling a hole for a bolt-type lock
- Prepare the Window: Before making any alterations, ensure the window is closed and the night lock, if present, is engaged. This confirmation ensures that the lock is functioning correctly and you can drill the hole safely.
- Mark the Drilling Spot: Using a pencil, mark the window track or frame to indicate where you want to drill the hole for the lock. If you're installing a barrel bolt or keyed lock, position it at your preferred height on the window frame, usually about half an inch from the jamb, and mark the location by pushing the barrel against the jamb.
- Remove the Window Track (if applicable): In some cases, it may be necessary to remove the window track to access the frame better. To do this, open the window, lift it upwards into the upper track, and gently tilt it towards you to remove it from the frame. Then, use a flat pry bar to remove the track by inserting it between the window frame and the track.
- Drill the Hole: With the window and/or track removed, it's time to drill the hole. Use a power drill with a drill bit that is slightly larger in diameter than the barrel of the lock (typically recommended as 1/8 inch or 5/16 inch larger). Position the drill at a 90-degree angle to the track or frame, using your pencil mark as a guide. Drill carefully and neatly to avoid damaging the frame.
- Reinstall the Window Track (if removed): Once the hole is drilled, carefully align and secure the window track back into place, ensuring it snaps into position without leaving any gaps.
- Reinstall the Window: With the track securely in place, reinstall the window by lifting it into the track with one hand on each side.
- Install the Lock: Finally, install your chosen lock. Position the strike or bracket over the drilled hole and screw it in place. For a keyed lock, keep the key nearby for easy access during emergencies but out of reach of potential intruders.
By following these steps, you can effectively drill a hole for a bolt-type lock, enhancing the security of your window while also allowing for ventilation when needed.
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Using a paperclip to unlock a window
Windows typically come with their own locking mechanisms, but these don’t always last as long as the windows themselves. Ageing, swelling, and paint can all cause locks to become ineffective over time.
If you find yourself locked out of a window, one method of entry involves using a paperclip. This method is not recommended unless you are locked out of your own home, as picking locks can carry criminal charges if done illegally.
To pick a lock using a paperclip, you will need two large paperclips, one to act as a tension wrench and one to act as the pick, and a pair of pliers to shape the paperclips. First, make your tension wrench by straightening a jumbo paperclip until it is two straight wires with a curve at the end. Press the curved end down with a wrench and make a 90-degree bend in the curved end. Insert the tension wrench into the bottom of the keyhole (the shear line) and apply rotational pressure in the direction that the lock turns. Next, bend the second paperclip into an "L" shape, leaving a fold across the shorter side. Slip the short, bent side into the upper "rake" and jiggle the clip until the lock unlocks.
If the window has no keyhole, only a small pin hole, you can straighten a paperclip and slide one end into the hole. Feel for a button on the inside of the lock and push it to unlock the door.
Please note that this method may not work for all windows, and there is a risk of breaking the lock or getting the paperclip stuck. If you are unable to unlock the window, consider calling a professional locksmith for assistance.
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Installing a wedge lock
A hinged wedge lock is a perfect match for double-hung windows, thanks to its straightforward yet effective design. It works like a small swinging metal piece that secures the window by wedging against the sash. This type of lock allows you to open the window partially for ventilation while preventing the sash from lifting far enough for an intruder to enter.
To install a wedge lock, you will need a window lock set, impact driver, power drill, nails, and tape, and safety glasses. Before you begin, check that the lock is compatible with your window type.
First, place the lock where you want to install it, ensuring it sits in a position to lock the window effectively. Use a pencil to mark the placement by fitting the pencil tip into the screw holes of the lock, creating dots on the window frame. Holding the lock in place, drill holes for the screws. Use a drill bit that fits the screw holes, and remember to wear safety glasses.
Next, use a screwdriver to tighten a screw into each mounting hole on the lock. Once installed, test the lock to ensure it works correctly. Keep the key nearby for quick access in case of emergencies.
For maximum security, you may want to consider installing multiple locks on each window or opting for locks that can be operated from both the inside and outside. Additionally, you can enhance security by installing window sensors, security bars, or window coverings.
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Using a dowel to secure a window
- Cut a 1-inch dowel to fit between the sliding window and the jamb. The dowel should be cut to the exact size of the track.
- Place the dowel flat in the track to secure the window. Ensure it is wedged tightly between the sash and the window frame.
- Optionally, you can push the dowel to one side to keep it out of sight. This step may depend on the type of window you have.
- For added security, you can drive a few screws into the top window track. Ensure the screw heads are just above the window sash. This will prevent the window from being lifted out of the track from the outside.
- Remember, if you need to open the window, simply remove the dowel.
Using a dowel is a straightforward way to improve the security of your sliding windows. However, it is important to note that this method may not provide the highest level of security compared to other options, such as installing key-operated locks. Additionally, consider combining this method with other security measures such as motion sensor lights or security cameras for a more comprehensive approach to securing your home.
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Frequently asked questions
First, close the window. Then, push the top part of the window, also known as the upper sash, upwards while simultaneously pushing the lower sash downwards. Move the latch to the closed position by moving it to the left. Check that the window is locked by trying to open it.
You can use a barrel bolt or a keyed lock, which can be installed by first closing the window and marking the window frame where the bolt or lock will be positioned. Then, drill a hole and screw the bolt or lock in place.
There are several non-destructive methods to open a locked window without a key. One method is to use a flexible plastic card, such as a credit card, and insert it between the window frame and the lock. Gently wiggle the card while pushing it against the lock to disengage it.
Yes, a paperclip can be used to manipulate simple locks. Unfold the paperclip into a straight line, leaving a small hook at one end. Insert the hook into the keyhole and gently push and turn it to unlock the mechanism.











































