Casement Window Won’t Close: Troubleshooting Tips

118casement window Alwew China First Intelligent Aluminum Window
118casement window Alwew China First Intelligent Aluminum Window from

Are you struggling with a casement window that won’t close properly? This can be a frustrating issue, but fear not, as we have some troubleshooting tips to help you resolve the problem. In this article, we will discuss common reasons why casement windows may not close and provide step-by-step solutions to get them functioning smoothly again.

1. Check for Obstructions

The first step is to examine the window frame and sash for any obstructions that might be preventing it from closing. Inspect the tracks, hinges, and hardware for any debris, dirt, or damage. Clean the tracks and lubricate the hinges with a silicone-based lubricant to ensure smooth movement.

2. Adjust the Sash

If the casement window doesn’t close properly, it could be due to a misaligned sash. To fix this, locate the adjustment screws on the hinges and use a screwdriver to loosen them slightly. Gently push or pull the sash to align it correctly, and then tighten the screws back in place.

3. Check the Weatherstripping

Worn or damaged weatherstripping can prevent a casement window from closing tightly. Inspect the weatherstripping around the frame and sash, and replace any worn-out sections. This will help improve the seal and ensure a snug fit when closing the window.

4. Verify the Latch Mechanism

Make sure the latch mechanism is engaging properly. If it doesn’t, adjust the strike plate by loosening the screws and moving it slightly until the latch aligns correctly. Tighten the screws to secure the strike plate in its new position.

5. Consider the Window Size and Weight

If you have recently replaced or upgraded your casement window, it’s essential to ensure that the new window is the correct size and weight for your frame. A window that is too heavy or too large may not close properly, causing issues. Consult with a professional if you suspect a sizing or weight problem.

6. Address Structural Issues

In some cases, a casement window might not close due to underlying structural issues. If you notice significant gaps or warping around the window frame, it’s advisable to consult a professional to assess and address any structural concerns.

7. Test the Window Operation

After attempting the above troubleshooting steps, test the window’s operation to see if it closes smoothly. Open and close the window several times to ensure it functions correctly and without any resistance or misalignment.

8. Seek Professional Help

If you’ve exhausted all the DIY troubleshooting options, it may be time to seek professional help. A window specialist or repair technician will have the expertise to diagnose and fix any complex issues with your casement window.


A casement window that won’t close is undoubtedly a frustrating problem, but with the right troubleshooting steps, you can often resolve the issue on your own. By checking for obstructions, adjusting the sash, inspecting weatherstripping, verifying the latch mechanism, considering window size and weight, addressing structural issues, and testing the window operation, you can improve the functionality of your casement window. If all else fails, don’t hesitate to contact a professional for assistance. Enjoy the benefits of a properly closing casement window and the peace of mind it brings.