Mortise Lock Repair & Replacement

A mortise lock is a complete mechanism — latch, deadbolt, and operating hardware — housed inside a rectangular case that is set into a pocket routed into the door edge. A standard door knob lock uses a round cylindrical bore and is generally less robust, with fewer integrated functions. Mortise hardware is the preferred choice for heavy-duty exterior doors, commercial entryways, and any application where long-term security and durability matter most. If you are unsure which type you have or whether a repair or replacement is the right direction, our technicians can assess it on-site.

Atlanta sits in a humid subtropical climate zone, and that means wooden door slabs expand noticeably during summer and contract in drier stretches — sometimes by several millimeters across the door thickness. That seasonal movement puts repeated stress on the latch-to-strike alignment and on the case screws that hold the mortise body inside the pocket. Over time, it contributes to latch dragging, difficult key turns, and trim that works loose. Periodic adjustment — tightening case screws, re-aligning the strike, lubricating the internal mechanism — keeps mortise hardware performing reliably through Atlanta's seasonal swings.

Yes. Our technicians carry tools and components for both electromechanical and smart mortise lock service. For an electric mortise lock, we inspect the wiring harness, solenoid function, and fail-safe or fail-secure configuration before recommending repair or replacement. For a smart mortise lock, we handle credential re-enrollment, firmware troubleshooting, and mechanical component service. If a full replacement is needed, we confirm the new unit's compatibility with your access control panel or app ecosystem before installation begins.

Several variables shape the final quote: the type and brand of lock body involved — a vintage antique case requires different sourcing than a current commercial electric mortise lock; the scope of work, whether it is a simple cylinder swap or a full case replacement with new trim; the time of day, since after-hours and emergency calls involve different resourcing than scheduled daytime appointments; travel distance to your location within the Atlanta metro; and whether specialty parts need to be sourced. We always confirm an exact price with you before any work begins, so there are no unexpected charges at the end of the job.

Absolutely. Atlanta Locksmiths operates as a 24/7 mobile emergency locksmith service throughout the Atlanta area. If a mortise lock failure — a broken internal spring, a seized deadbolt, a snapped cylinder — leaves you unable to enter or secure your property, call (470) 681-9505 any time of day or night. We dispatch a trained, insured technician directly to your address. Our first priority is always ownership verification and a damage-free resolution, so we assess the situation carefully before taking any action on the lock.

Yes. Sliding door mortise lock hardware uses a hook bolt configuration rather than a standard latch, and the keeper geometry on the frame must align precisely for the lock to engage fully. We service these on residential patio doors, commercial glass storefronts, and heavy-duty sliding fire doors. We also work on the full range of commercial door hardware common in Atlanta office buildings, hotels, and institutional facilities, including Corbin Russwin mortise lock bodies and other commercial-grade cases. Whether it is a single residential door in Virginia-Highland or a multi-door commercial project near Hartsfield-Jackson, we size the job and dispatch accordingly.