Lock Replacement in Thornbury, Delaware County, PA

A lock that keeps getting stiff or slipping may have worn parts inside.

In Thornbury, we replace worn or damaged house door locks with new hardware suited to the opening. If the working parts are still sound and you simply want old keys to stop working, rekeying may be enough. Repeated trouble with the mechanism points to a different choice: replacing the cylinder or the whole assembly, rather than changing the key alone.

You might also want a different style, finish, or level of security. A knob or lever gives you a choice of grip, while a deadbolt provides a separate locking point. A handle set combines an exterior handle with matching hardware and comes in several configurations. We fit new hardware to existing doors, though the openings and thickness limit which models will fit without changes. For homes in Thornbury with several exterior entrances, compatible cylinders can be arranged to work with one key.

We first look at your existing hardware, the thickness of the door and the size and spacing of its openings.

That tells us which replacement styles are likely to fit and whether the existing cylinder is worth rekeying instead. If the mechanism is worn or damaged, changing the complete unit may be the better choice. Before starting, we explain the fit and your options for matching the finish to the door. A close match to the surrounding hardware may be possible, or you might prefer a contrasting look. Finishes with similar names can look different, so we compare the choices with you.

You can choose a knob or lever for the main entry, add a deadbolt, or select a handle set if the openings suit it. We also check whether the selected cylinders can share one key across your house doors. If they cannot, we explain which combinations will work. After installation, we check the operation with you, turning the key and testing the latch with the entry open and closed. We also show you how the new hardware operates.

A lock that keeps wearing out may be taking pressure from a door that does not line up properly.

With the door open, turn the key and work the latch and deadbolt gently. Then close the door and try them again. If you have to lift or pull the door to make it work, or the key catches, do not force it. Call us to check the fit, since continued pressure can wear out the new hardware too.

Keep the key clean and avoid using it to pull the door shut. Wipe the outside hardware with a soft, damp cloth, then dry it. For a stiff mechanism, use only a lubricant recommended by the manufacturer, and avoid household oil. Grinding or a loose handle is worth a closer look, because forcing or spraying parts at random can make the problem harder to trace.