How to Fix a Window That Won't Open

Most stuck windows can be fixed by cleaning the tracks, lubricating moving parts, checking for paint seals, or adjusting the hardware.

  1. Spot the Problem First. Look closely at the window frame, tracks, and sash for obvious problems. Check for debris, dried paint, warped wood, or broken hardware. Run your finger along the tracks to feel for rough spots or obstructions. This visual inspection will tell you what type of repair you're dealing with.
  2. Clear the Hidden Gunk. Use a vacuum with a crevice tool to remove loose dirt and debris from the tracks. Follow up with a damp cloth to wipe down all surfaces. For stubborn grime, use an old toothbrush with warm soapy water. Make sure the tracks are completely dry before moving to the next step.
  3. Break the Paint Prison. Look for dried paint that has sealed the window shut. This is common in older homes. Carefully score along the paint line with a utility knife, cutting through the seal. Work slowly to avoid gouging the wood or damaging the window frame.
  4. Grease the Right Way. Apply a small amount of silicone spray or white lithium grease to the tracks, hinges, and any pivot points. Avoid using oil-based lubricants as they attract dirt. Work the lubricant into all moving parts by gently attempting to open the window several times.
  5. Dial In the Hardware. Examine the window locks, handles, and any adjustment screws. Tighten loose screws with a screwdriver. If the window has adjustment screws on the hinges or frame, try turning them slightly to realign the sash. Make small adjustments and test the window operation after each change.
  6. Sand the Stubborn Spots. If the window frame or sash has swollen due to moisture, you may need to sand down the high spots. Use fine-grit sandpaper and work carefully to avoid removing too much material. Focus on areas where the wood is obviously rubbing or binding.
  7. Verify It Glides Smooth. Try opening and closing the window several times to ensure smooth operation. If it still sticks in certain spots, repeat the cleaning and lubrication process. Make note of any remaining issues that might require professional attention or replacement parts.