The 7 Lock Upgrades That Actually Prevent Break-Ins

Every year, approximately 2.5 million burglaries occur in the United States — and the FBI's own data shows that 34% of intruders simply walk in through the front door. Not through a broken window, not through a complex bypass — through the front door, because the lock was inadequate, poorly fitted, or decades out of date. The good news is that the right lock upgrades, installed correctly, can reduce your break-in risk dramatically. Here are the seven that actually make a difference.

Cylinder snapping is now the dominant method of entry for opportunist burglars in the UK and increasingly common in the US. The technique is brutally simple: a screwdriver is inserted into the cylinder and levered until the lock snaps at its weakest point — typically just beyond the cam — leaving the remaining mechanism easily operated with a flat tool.

Standard euro cylinders offer almost zero resistance to this attack. They're designed to break to protect the door mechanism, which sounds sensible until you realise it also allows instant entry. Anti-snap cylinders are engineered to snap at a sacrificial point that leaves the lock fully operational and the door secured.

ANSI (American National Standards Institute) grades deadbolts on a three-tier scale. Grade 3 is the minimum — found in most builder-grade homes and genuinely inadequate for security. Grade 2 is acceptable. Grade 1 is what you actually want.

Grade 1 deadbolts must withstand 250,000 open-close cycles, a 360 lb door kick test, and 10 strikes with a 75 lb weight. Grade 3 bolts only need to survive 80,000 cycles and a single 75 lb strike. In real-world terms, Grade 1 locks are engineered to resist sustained physical attack — Grade 3 bolts are not.

This is the single cheapest, most impactful security upgrade most homeowners never make. The strike plate — the metal plate recessed into the door frame where the bolt engages — is typically secured with ½-inch or ¾-inch screws that bite only into the door frame trim, not the structural stud behind it.

A single kick at a door secured with standard strike plates and screws will typically defeat the lock in one or two blows, regardless of how strong the deadbolt itself is. The door frame simply splits. Replacing these with 3-inch screws that penetrate into the structural stud takes a $4 investment and 20 minutes — and turns a one-kick door into something that will resist sustained kicking.

Better still, install a heavy-duty security strike plate (sometimes called a wrap-around strike plate) that extends behind the frame moulding and distributes kick force across a much wider area. These cost around $20–$40 and can be installed with a standard screwdriver.

A high-quality door chain or security bar adds a second independent locking mechanism that operates from inside the property. While these are not a substitute for a proper deadbolt — they offer no protection when you're away — they add meaningful protection during occupancy, particularly at night.

Choose a chain or bar with a steel housing that screws into the structural frame (not just the door frame trim) using — again — 3-inch screws. Brass-plated chains are decorative but weak; look for hardened steel chain links rated to resist cutting.

Sliding glass doors are a major security vulnerability in many homes — one that is almost entirely overlooked. Most sliding doors ship with a basic latch mechanism that can be defeated by simply lifting the door off its track. Even when locked, the standard hook latch offers minimal resistance to the "lift-and-pull" attack.

Three upgrades work together here: a track lock (a metal bar or pin that prevents the door from sliding even when the latch is defeated), anti-lift blocks installed in the upper track, and a secondary foot lock at the base. Total cost for all three: under $50.

Quality smart locks from reputable manufacturers offer several genuine security advantages over traditional locks: no physical key that can be duplicated without your knowledge, granular access control (you can revoke a code instantly), and full entry logs. They also eliminate the risk of someone finding or stealing your keys.

The key phrase is rolling code encryption. Avoid any smart lock that uses static Bluetooth or RF codes — these can be intercepted and replayed. Look for locks certified to ANSI Grade 1 with AES-128 encryption minimum. August, Schlage Encode, and Yale Assure are solid choices.

This is less a physical upgrade than a protocol — but it may be the most important item on this list. Rekeying (changing the pin tumblers so existing keys no longer work) costs $20–$50 per lock and should be done in any of the following situations:

• Moving into a new or previously rented property
• After a relationship breakdown where a former partner had keys
• After dismissing a cleaner, contractor, or domestic employee
• When a key is lost or cannot be fully accounted for
• After a nearby burglary (in case a key was taken and held)

Many homeowners are surprised to learn they can rekey most lock cylinders to a new key while keeping the same lock hardware — you don't need full replacement. A SecureKey technician can typically rekey a standard residential lock in under 10 minutes per cylinder.

Where to Start: A Priority Order

If you're working with a limited budget, prioritise in this order: anti-snap cylinder first (biggest return for money), Grade 1 deadbolt second, security strike plate with 3-inch screws third. These three upgrades together — typically $150–$280 all-in installed — will put your front door in the top 10% of residential security in the country.

The remaining four upgrades are meaningful but secondary. Add them progressively as your budget allows, working through sliding doors, smart locks, secondary door bars, and rekeying protocols.

If you'd like a professional assessment of your current vulnerabilities, SecureKey offers a free security consultation for residential customers. Our technicians will inspect every entry point and provide a prioritised, no-obligation recommendation list.