How to Open a Stuck Window

It can be quite frustrating when you want to open a window and find that the window won’t budge. Windows can get stuck for a number of reasons: wood frames may have warped in wet weather, the house may have settled or someone may have painted the frames shut. With patience and a few handy techniques, most stuck windows can be opened.

Method 1

Method 1 of 3:

Prying a Window Open

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1
Examine the window. Look at both sides of the window, interior and exterior.
- Make sure it is a window that is meant to be opened. Some new office and home windows are not meant to be opened. If there are no hinges or the window is a single pane with nowhere to slide, it likely does not open.
- Make sure that the window is not nailed or screwed shut for security or energy conservation reasons.
- Check for any staples around the interior of the window where plastic sheeting may have been fastened. Carefully remove them with needle-nose pliers.
- Make sure any locks are disengaged.
- Look to see if the window frame has been recently painted.
- Decide which direction the window is supposed to open: up, outward or sideways.
2
Loosen any paint that is sealing the window shut. Removing dried paint that collected between the window and frame will free the window and allow it to be opened.^{[1]XResearch source}
- Use a razor knife to cut along the edge of the window and the frame. Cut across all four sides of the window. You may need to check the exterior of the window in addition to the inside to make sure that it isn’t painted shut on both sides.
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Wriggle the knife back and forth to loosen any dried paint between the window and the frame. Go around the entire edge of the window to loosen all sides.
Use a wood block to cushion the blows from the hammer and prevent making dents in the wood of the window. Be careful to hit gently so as not to break the window. Hammer the wood portion of the window and not the glass.
5
Push on the window with your hands. Try to loosen the window one side at a time. Then try to push the window down as if you were closing it. If it moves, make sure the window is straight in its frame and slowly attempt to open it.
- Push each corner to see if there is any movement.
- Press on the window gently to open it a little at a time.
6
Force the window up with a pry bar. Place a small block of wood on the window frame to give your pry bar more leverage. Gently force the window up with the pry bar.
- Reposition the pry bar along the bottom edge of the window to lift both sides of the window.
- Using a pry bar may damage the wood of the window or window frame, use this method very carefully as a last resort.

Method 2

Method 2 of 3:

Lubricating a Stuck Window

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Spread wax from the bottom of a candle into the window channel. The wax will help allow the window to slide up and down and prevent future sticking.^{[2]XResearch source}
2
Remove moisture from the window frame. Wood may swell due to humidity causing windows to become stuck. Drying out the wood may help the window open more easily.^{[3]XResearch source}
- Run a hair dryer along the edges of the window frame for several minutes. After drying the wood, try opening the window.
- Place a dehumidifier in a room with stuck windows. Lowering the humidity in the room should help reduce the swelling of the window frames.
If the window is in a wooden frame, place a wood block along the channel where the window opens and hammer it gently to depress the wood. Make the channel wider to allow the window to move more freely.
4
Spray a lubricant such as WD-40 along the edge of the window. Be careful when using spray lubricants as they may discolor some surfaces or damage some types of paint.
- If the window opens outward on hinges, spray the hinges with the lubricant for smoother operation.
5
Open the window repeatedly. After you get the window to open one time, open and close it several times to loosen the action of the window. If it still sticks, check the frame to ensure that it isn’t warped or damaged from water. Feel for areas where the window meets some resistance and use a utility knife or sandpaper smooth it out.
- Window frames with severe water damage may need to be replaced entirely.

Method 3

Method 3 of 3:

Removing a Window Sash

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1
Remove the window stops. The stop is a small piece of trim in the window frame that holds the movable sash in place. Examine the stop to determine how it is attached to the window frame.^{[4]XResearch source}
- Use a utility knife to remove any paint that is sealing the stop to the window frame.
- Remove any screws that are holding the sash in place.
- Gently pry the stop out using a flathead screwdriver or paint scraper.
- Be careful when removing the stops as they can snap easily. You may need to purchase a replacement stop to reinstall the window.
Remove the locks or latches used to close the window. Check for any additional hardware from curtains or other additions that may be attached to the window sash or frame.
3
Tilt the top of the bottom section of the window inward. Remove the bottom sash first by leaning it in towards the inside of the house. As you lean it inward, pay attention to the ropes connecting the window to the pulley inside the frame.
- Remove the rope from one side of the window by pulling the knot down and out from the side of the window sash.
- Remove the other rope from the other side in the same manner.
4
Smooth the edges of the sash. Once the sash is removed, sand the edges to remove any paint or swollen wood causing the window to stick. Make sure to sand evenly to avoid creating additional bumps or uneven surfaces which may cause additional sticking issues.
- Use a hand planer on the sides of the window if your sash has swelled.
5
Remove the upper sash. In double hung windows the upper sash can be removed as well. Remove any paint that is sealing the window shut to be able to move the sash.
- Use a razor knife to cut around the edges of the window inside and outside.
- Slide the upper sash down to reveal the pulleys in the side of the window jamb.
- Pull the right side of the window in to free it from the jamb.
- Remove the rope connecting the sash to the pulley inside the window frame and jamb.
- Pull the left side of the window out and remove the rope.
Check the edges of the sash for any paint or warped wood. Sand the sash smooth to allow for better operation.
Remove any dried paint that has built up along the window sash with a scraper and sand the track smooth.
8
Replace the window sashes. Reverse the steps used to remove the window sashes to put them back in place.
- Attach the ropes to the upper sash and slip it in place one side at a time.
- Attach the ropes to the lower sash and place the bottom half in first. Push the upper half in place.
- Slide the window stop back in place and attach it with screws or finish nails.

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Question
What should I do if my window lock will not open?
Community Answer
Spray the lock with WD-40 or similar product and let it sit for 24 hours. You could also see if the lock is attached to the window or frame and unscrew or otherwise remove the entire lock.
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Can I just break my window?
Community Answer
You could, of course, but you would have to replace the entire window, and you're risking an injury and/or property damage.
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What should I do if my aluminum window will not open?
Community Answer
Follow the steps in the article. If nothing works, call a professional to fix it.
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Tips

A cooking spatula or butter knife with a stiff metal blade can be used in place of a putty knife.
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Work slowly and carefully rather than applying a lot of force quickly.
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If you can’t get a pry bar between the window bottom and the frame put two small screws in the frame near the bottom of each corner, leaving the head of the screw sticking out a bit. Use these to put the pry bar under and pry up on. This can damage the frame a bit.
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Show More Tips

- If your window operates with a crank, spray WD-40 or another lubricant on the frame and let it sit for 5 minutes. Have a helper carefully open the window while you crank it. Lubricate any of the other hinges while the window is open.

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Warnings

Wear work gloves and safety goggles when trying to force open windows as the glass may break.
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Getting one corner of a window too much higher than the other when forcing open a window will probably result in cracking the window glass.
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If a house has settled a lot, or there has been damage from a storm or other disaster the window frame may be too warped to be able to open the window safely. The whole window may need to be removed and the frame repaired or replaced.
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