Deadbolt Installation

Not every exterior door takes the same lock, and choosing the wrong type is one of the most common and costly mistakes homeowners make. A standard single-cylinder deadbolt fits most modern pre-bored doors and offers solid security when properly installed with a reinforced strike plate and 3-inch screws that reach the door's structural framing. But older homes in Merrionette Park — particularly those built before the 1980s with thicker, heavier doors — are often better suited to a mortise lock. A mortise lock fits into a rectangular pocket routed into the edge of the door and integrates a bolt, latch, and sometimes a night latch into a single robust body. It distributes force across a much larger surface area than a cylindrical lock, making it significantly harder to kick in or pry apart. Our technicians are highly experienced with mortise lock fitting, including sourcing compatible cylinders for older profiles that hardware stores no longer carry on the shelf.

For doors that swing outward or that have exposed hinge pins, a jimmy proof deadbolt installation is often the right call. These rim-mounted locks interlock with the strike rather than simply bolting into it, which means lateral force — the kind applied when someone tries to pry the door away from the frame — does not work against the mechanism the same way. If you are unsure which configuration your door needs, that assessment is part of what we do when we arrive. We look at the door material, the frame condition, the swing direction, and the existing bore holes before recommending anything.

There is a significant difference between dropping a boxed lock into an existing bore hole and executing a proper deadbolt installation. The bore hole diameter must match the lock body exactly — typically 2-1/8 inches for most residential cylinders — and the edge bore must align precisely with the bolt centerline. If either measurement is off, the bolt will not throw fully or will bind under normal use, which stresses the cylinder and shortens the lock's lifespan considerably. Our technicians use calibrated hole saws and bore guides to ensure clean, accurate cuts when new boring is needed, and they check bolt-throw clearance before the lock is ever tightened down.

Strike plate installation is equally critical and is often the weakest point in a door that has never been professionally fitted. The standard strike plates included in retail lock boxes typically attach with 3/4-inch screws that anchor only into the door casing, not the structural frame behind it. A determined kick can pull those screws free in one strike. We use heavy-duty reinforced strike plates with extended screw channels and drive 3-inch fasteners directly into the stud or structural jamb, which is the single most effective upgrade you can make to an existing door without replacing it. If you are in Merrionette Park and you want to know whether your current setup meets that standard, give us a call at (708) 787-4833 — we answer 24/7 and are happy to talk through what we would check when we arrive.

Our installation work covers the full range of residential and commercial exterior lock types. For traditional residential entry doors, single and double-cylinder deadbolts from manufacturers such as Schlage and Kwikset are common choices because their components are widely available and their keyways are easy to rekey later. For properties that require higher pick resistance or bump resistance, we can source and install Grade 1 locks with security pins and anti-drill hardened steel inserts. On doors where the owner also wants to retain a door knob lock for latch convenience, we install both units aligned to the correct backset — 2-3/8 inches or 2-3/4 inches depending on the door — so both locks operate smoothly without interfering with each other.

For commercial properties in Merrionette Park and the surrounding area, our commercial locksmith services extend to heavier-duty mortise lock bodies with interchangeable cores, panic-bar compatibility, and key-control keyways that restrict unauthorized duplication. A commercial locksmith assessment also looks at door closer hardware, frame reinforcement, and whether the existing mortise pocket needs enlarging to accept a new body. Rim locks and jimmy proof deadbolt configurations are particularly common on commercial steel doors and on apartment building common entrances where the door geometry does not allow a standard bore. We stock a range of rim cylinders and can match existing key profiles where a master key system is already in place.

Merrionette Park is a small, tightly-knit community bordered by Rosemoor to the north and Alsip to the south, and most of our local customers find us because a neighbor or landlord passed along the number. When you call (708) 787-4833, you reach a live person — not a voicemail — who will ask a few quick questions about your door type, your lock situation, and your address. Based on that, we give you an exact up-front price before any technician departs. The final quote accounts for the type of lock involved, any new hardware required, the time of day, and travel distance. Nothing is added afterward. There are no surprise charges for after-hours emergency locksmith calls — the price you agree to on the phone is the price you pay.

Our mobile setup means the technician arrives with the tools and a selection of hardware to handle most jobs on the first visit. For standard residential bore sizes and common mortise pocket dimensions, we carry inventory that avoids the need for a return trip. If your door requires a specialty item — an unusual mortise body size, a high-security cylinder with a proprietary keyway, or a replacement component for an older rim lock — we will tell you that on the phone and coordinate sourcing before scheduling, so you are not waiting around. We work carefully to avoid damaging door finishes, frame paint, or weather stripping, and any new bore work is done with a dust-controlled setup where the interior space allows it. Whether it is a routine upgrade or an emergency locksmith call in the middle of the night, the standard of work is the same.

Beyond exterior deadbolt work, Alsip Locksmiths provides a comprehensive set of services for residential and commercial customers throughout the Merrionette Park area. These include: single-cylinder deadbolt installation on new and existing doors; double-cylinder deadbolt installation for glass-panel doors; mortise lock installation and pocket routing on wood and steel doors; jimmy proof deadbolt installation on outward-swinging and exposed-hinge doors; door knob lock replacement and alignment; knob-and-deadbolt combination fitting to matching backsets; rim lock and surface-bolt fitting; high-security cylinder upgrades with anti-pick and anti-bump pins; Grade 1 residential lock installation; Grade 2 and Grade 3 lock fitting for rental and secondary door applications; strike plate reinforcement and frame repair; 3-inch security screw upgrades on existing strike plates; lock rekeying after a move-in or key loss; master key system setup for multi-unit residential buildings; commercial locksmith deadbolt and mortise installation on steel-frame commercial doors; interchangeable-core lock installation for commercial properties; panic bar and exit device installation; key duplication for new hardware; smart lock and electronic deadbolt installation and wiring; lock replacement following break-in or attempted forced entry; emergency locksmith lockout response; broken key extraction from deadbolt cylinders; door alignment adjustment to correct binding bolts; mailbox and gate lock installation; padlock and hasp installation on outbuildings and garages.

Every service on that list is carried out by trained, insured technicians who arrive at your location — we never ask you to drop hardware off somewhere or wait for a parts order to ship. The mobile model works because we invest in keeping our vehicles stocked and our technicians skilled across the full range of lock types, from the simplest passage knob to a full commercial mortise lock body replacement.