
Garage Door Lock Installation: What the Job Actually Involves
Replacing or upgrading a garage door lock is more involved than swapping a standard interior knob. Many attached garages use a side-entry steel door with a mortise lock — a full-body lock assembly that sits inside a routed pocket in the door edge rather than surface-mounting to it. A mortise door lock provides far superior resistance to kick-in and pry attacks compared to a standard tubular deadbolt, which is why we recommend it for any door that connects a garage directly to the living space. Our technicians measure and route the mortise pocket precisely, install the lock body and face plate flush to the edge, and test the cylinder throw before leaving the job. For roll-up garage doors with a T-handle or bar-style mechanism, we assess the existing hardware, replace worn cylinders, rekey as needed, and reinforce the bar guide if it shows wear.
Sliding garage or workshop doors require a different approach entirely. A sliding door lock replacement typically involves replacing the surface-mounted latch or hook bolt, upgrading the floor-drop bolt for secondary security, and — when the frame allows — adding a mortise-style sliding door lock for stronger engagement. We carry hardware suited to both aluminum-framed and wood-framed sliding doors, and we take care not to widen existing holes or damage the door face during installation. Once the new hardware is set, we verify smooth operation across the full slide range so nothing binds in Chicago's freeze-thaw seasonal cycles.
