Is your door not latching properly because the gap is too big and the latch bolt seems too short to reach the strike plate? This is a common issue, especially with exterior doors, and thankfully, it’s often a straightforward fix. It’s less likely to be a problem with the door casing itself and more likely related to the door frame, also known as the jamb. Let’s explore how to diagnose and solve this problem effectively.
Identifying the Root Cause: Jamb Alignment
The primary culprit when you encounter a door gap that’s too wide for your latch bolt is usually the alignment of your door jamb. While it might seem like the latch bolt is too short, the real issue is that the strike plate is positioned too far inwards relative to the bolt. This often happens because the jamb wasn’t properly shimmed during installation, or it has shifted over time.
Another potential cause, particularly in exterior doors, is overtightening the long security screws that are often used to install the strike plate. When these screws are excessively tightened, they can pull the jamb inwards, creating a larger gap and misaligning the strike plate.
Step-by-Step Solution: Adjusting the Jamb for a Proper Latch
Here’s how to address a door gap that’s too big due to jamb misalignment:
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Expose the Jamb: Begin by removing the strike plate from the door jamb. This will give you access to the jamb and allow you to assess its movement.
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Check Jamb Mobility: Use a small pry bar or a similar tool to gently test if the jamb can be moved outwards. You’ll need to apply enough force to overcome the resistance from casing nails and any fasteners securing the jamb to the framing. Be careful not to damage the surrounding trim or casing.
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Create Leverage (If Necessary): If the jamb is stubborn and doesn’t move easily, you can use a construction or drywall screw to gain leverage. Partially drive a screw into the jamb within the strike plate mortise. This screw will act as a handle, allowing you to gently pull the jamb outwards. Exercise caution to avoid splitting the casing, especially if there are nails nearby.
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Shim the Gap: Once you can move the jamb to the correct position – closing the excessive door gap and aligning it properly with the latch bolt – you’ll need to shim it to hold it in place. You can use various materials for shimming, even simple items like folded paper or cardboard can work temporarily. For a more permanent solution, consider using thin wood shims or even inserting a screw behind the strike plate to act as a shim. The goal is to fill the gap behind the jamb and push it outwards.
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Secure the Jamb: With the jamb correctly positioned and shimmed, it’s time to secure it permanently. Use a countersunk, piloted, full-thread screw and drive it in behind the strike plate location. This screw will lock the jamb in its adjusted position and provide a solid backing for the strike plate.
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Reinstall the Strike Plate: Finally, reinstall the strike plate over the adjusted jamb. Ensure the latch bolt now smoothly enters the strike plate opening without catching or binding.
By following these steps, you can effectively fix a door gap that’s too big and ensure your door latches securely. Often, it’s a simple adjustment of the door jamb that makes all the difference, resolving the issue of a seemingly “short” latch bolt.
