6 Ways to Unstick Windows That Have Been Painted Shut
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Opening windows that have been painted shut can prove challenging, as dried paint creates a surprisingly strong hold. Whether it was a simple window painting mishap or your home got the “landlord special,” where every surface was covered with layers upon layers of white paint, you’ll need to break the seemingly impenetrable seal that the dried paint creates.
To help you get started, this guide explains various methods for opening a window that has been painted shut, along with the necessary safety measures to use.
How to Unstick Windows That Have Been Painted Shut
To open windows that have been painted shut, you need to break through the paint holding the window shut. While this may sound simple, it can be difficult.
Here are a few different effective methods, but you need to choose the one that is right for your situation. For example, if you want to preserve the paint on the window, choose a method that disturbs it as little as possible.
1. Apply Heat
A heat gun is useful for warming and loosening the paint bond, which allows you to easily scrape it off the window and remove it from the sash so you can open the window. It can be challenging to pinpoint precisely where to apply the heat, so you should only rely on heat application if you aren’t looking to preserve the surrounding paint.
Before using a heat gun, ensure there’s nothing nearby that can be damaged and refrain from using heat on plastic window sashes, as they may warp and melt.
2. Score the Paint With a Multitool
Painter’s multitools, such as a 5-in-1 tool, are effective for scoring and cutting out paint that’s holding a window shut, as they’re both strong and sharp. However, the thicker blade might damage the surrounding paint, so choose this option only if you’re looking to replace the surrounding paint.
3. Score the Paint With a Utility Knife
If you want to preserve the paint finish while also unsticking the window, scoring the seal with a razor blade or a utility knife can offer the cleanest cut. However, if your paint is old, brittle, or has several layers, it can be difficult to score it cleanly.
If this is the case, a heat gun can be effective for warming and softening the paint, allowing you to score it more easily and cleanly. To preserve the paint on the window, avoid applying too much direct heat, as it can cause the paint to bubble and compromise its integrity.
4. Break Deeper Seals With a Putty Knife
If you’ve scored the paint along the window sash, but the window still won’t budge, dried paint may have seeped deeper into the sash. To break this invisible paint’s hold, place a thin, flexible putty knife in the gap and lightly tap it with a hammer. Work your way around the window until you’ve fully broken the seal and the window opens.
If the window has been painted shut, there’s a good chance it hasn’t been operable for years. To aid in future operation and prevent your window from getting stuck again, apply a spray lubricant, such as silicone spray, to the tracks.
5. Use Wood Shims to Open the Gap
As you work your way around the window, slide thin wood shims into the gap to slightly hold the gap open, lightly tapping them into place with a hammer if needed. Be careful not to push the shims in too far, as this may stress the window and could even break the glass.
6. Score the Outside of the Window
Still no luck? If you haven’t already, check the outside of the window to ensure it hasn’t been painted shut as well.
Window Paint Removal Safety Tips
Before attempting to remove paint, take the necessary safety precautions to keep you and those around you safe during the paint removal process.
- Test for lead paint. Removing lead paint requires a higher level of precaution. Most experts recommend skipping lead paint removal and instead opting for encapsulation, so your safest bet may be to score the paint enough to open the window without removing it altogether.
- Wear the appropriate safety gear. Whenever removing paint, wear the proper respirator to protect against both particles and fumes. Additionally, wear safety glasses and gloves when working with tools for paint removal.
- Use caution when scoring paint. Whenever you’re using a blade to score paint, use extreme caution and do so slowly and steadily. Moving too quickly or applying too much force may result in injury or damage to the surrounding materials.
- Consider masking the glass. When working around windows with hand tools, there’s a risk of broken glass. To protect your windows, consider taping cardboard to cover the glass while you work.
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