What Door Knob Lock Replacement Actually Involves
Replacing a door knob lock is rarely as simple as unscrewing the old hardware and dropping in a new one. Knob locks come in several configurations — privacy knobs for bedrooms and bathrooms, keyed entry knobs for exterior doors, passage knobs for hallways, and double lock door knob setups that combine a keyed cylinder with an interior turn-button for added security. The existing bore hole diameter, backset measurement (typically 2-3/8" or 2-3/4"), door thickness, and whether you're working with a standard latch or a deadlatch all influence which replacement unit will fit correctly. Our technicians measure and verify every dimension before sourcing hardware, so you never end up with a knob that binds, gaps, or leaves the strike plate misaligned.
For exterior entry doors, we frequently recommend pairing a quality knob with lock and key — such as a Schlage or Kwikset Grade 2 or Grade 1 keyed knob — with a deadbolt above it, because a knob lock alone on an exterior door can be forced more easily than many homeowners expect. When the existing door prep allows, we can also upgrade to a mortise lock body, which integrates the latch, deadbolt, and sometimes a chain or night-latch into a single robust unit mortised into the door edge. Mortise lock installation is a signature service we carry out on older Pleasantville colonial and craftsman homes where the door thickness and style suit the hardware beautifully.
