Sometimes old age, rust and wear take their toll on our door locks, requiring us to replace them before they become too troublesome. Internal door locks differ from outside ones that are normally equipped with secure locks that are difficult to “pick”. Inside doors make use of a mortise, positioned in the door hollow, which docks into a latch plate mounted in the doorframe. This allows you to lock your door from either side as you desire.
Mr-Skill recommends that you remove the old mortise and take it to your local hardware store as a sample. After that, the similar replacement lock is quick and easy to fit, avoiding the need to make modifications to the existing door.
Having made your purchase, here are the steps involved in fitting your new lock. This job should take no longer than 30 minutes. However, if you want peace of mind you may prefer to find a window and door fitter right here on Mr-Skill.
What You’ll Need
- Internal door lock assembly, including keys
- Chisel for minor adjustments
- Screwdriver correctly sized for the screw heads
- Position the new mortise into the hole in the door that held the old mechanism. Test for smooth and flush fitting into the latch plate. If necessary, tighten up screws holding the latch plate in the door frame (they can become loose with constant opening and closing of the door).
- If everything lines up correctly and the closing action is good, secure the mortise in position using wood screws on the closing edge of the door.
- Re-fit the handles on either side, carefully securing them with wood screws.
- Test that the key locks smoothly from either side of the door.
If you are getting a window and door fitting quote, make sure that the service provider knows to replace like-for-like door locks to save you money.
One of our ever-present London window and door fitters offers the following tip.
“Once you have fitted your new internal door lock, be sure to place one of the two keys in a safe place. Also note the unique number inscribed on it, in case you ever need a replacement. In fact, you should consider keeping a register of all your key numbers!”