How to Secure Your Front Door

This page is deliberately not a fear-framed one. The reason to work on a front door is not that somebody is coming; it is that the standard specification of a US front door assumes a polite world, and bringing it up to a sensible standard is cheap, quick and permanent. Almost none of it is a product you plug in.

Why the frame fails first

Picture what actually happens when a door is kicked. The force goes through the slab, into the bolt, into the strike plate, and then into whatever the strike plate is screwed to. On a typical installation that is a 3/4-inch pine jamb, and the screws are 1/2 to 3/4 inch long, which means they end in the jamb and not in the framing timber behind it. The jamb splits out around the screws. The lock is undamaged; the hole it was sitting in is gone.

That is why lock upgrades disappoint and why the first job is the boring one. A reinforced strike plate spreads the load over a larger area of jamb, and — the part that does the actual work — 3-inch screws pass through the jamb, through the gap behind it, and bite into the structural stud. The same logic applies to the hinges: three screws per leaf, replaced with 3-inch screws, costs nothing and removes the other half of the problem. Do both sides on the same afternoon.

The deadbolt itself: throw, not brand

With the frame sorted, the bolt matters. The specification that counts is the throw — how far the bolt extends out of the door edge. A long throw crosses more of the gap between door and frame, so a spread frame or a pry bar has further to go before the bolt clears the strike. Short-throw bolts, and latch bolts in a handle set, are not security hardware.

Two things that are not specifications but decide real outcomes. First, use the deadbolt. A surprising share of forced entries are through doors that were on the latch, which is the actual argument for a smart lock: auto-lock means the door is locked whether or not anyone remembered. Second, if the deadbolt only throws when you lift or lean on the door, the strike is misaligned and the bolt is not fully extended even when it feels locked — fix the alignment rather than living with it. Which locks are worth the money is in our deadbolt roundup, and the grading claims printed on the boxes are decoded in our ANSI/BHMA guide.

Glass: the problem nobody wants to hear about

If there is glass in the door, or a sidelight beside it, within arm's reach of the interior thumbturn, then the lock is decorative against anyone willing to break glass. This is the most common unaddressed weakness on an otherwise well-secured door, and there are three honest answers:

• Security film on the glass. A laminate applied to the inside face holds the pane together when it is struck, so the hole does not open up and a hand cannot reach through. It is the least intrusive fix and it is not a replacement for laminated glass.
• A double-cylinder deadbolt. A key on the inside as well as the outside means reaching the thumbturn achieves nothing. Understand the trade-off before fitting one: a key-both-sides lock is a hazard in a fire or any emergency exit, it is restricted or prohibited by code in some jurisdictions, and if you fit one the inside key has to live in a known place within reach of the door every single night. Many households should not make this choice.
• A secondary bolt out of reach. A surface bolt or a chain fitted high or low, away from the glass, gives a second fixing that a hand through a pane cannot operate.

Glass also makes a case for a sensor rather than a lock. A contact sensor on the door tells you it opened regardless of how; a glass-break sensor covers the pane itself, and that field is ranked in our glass break sensor roundup.

The outward-opening door, and other exceptions

A door that opens outward cannot be kicked in, which is good, and its hinges are on the outside, which is not. Fit hinges with non-removable pins or security studs — a stud that engages a hole in the opposite leaf when the door is closed, so the door cannot be lifted off even with the pins out. These are standard parts, not specialist hardware.

Two more worth knowing. A storm door in front of your entry door is not security hardware at all: the slabs are far too thin for a deadbolt, the hardware is a proprietary mortise set, and no mainstream smart lock fits one — the full explanation is in our storm door guide. And a door from the garage into the house is usually your most vulnerable entry and is also code-regulated, which limits what you may legally do to it — that case is covered in our garage entry door roundup.

Where the electronics genuinely help

Not at the point of attack. Everything above is about resisting force; the electronics are about the other two thirds of the problem, which are knowing and deterring. Three things earn their place:

1. A lock that tells you its state and locks itself. The real-world failure is an unlocked door, not a defeated one. Auto-lock and a status you can check from bed fix a human problem that no amount of steel does.
2. A contact sensor. The cheapest useful device in home security. It tells you the door opened, which is the one fact a camera cannot reliably give you, and it works with no internet.
3. A doorbell camera. Most front-door incidents are not forced entries at all; they are parcels, callers and people trying handles. A doorbell covers that, which is why it is the most-used piece of security hardware in most houses — the field is in our doorbell roundup.

What the electronics do not do is respond. Nothing on this page dispatches anybody; you are the monitoring service unless you pay for one, and the honest version of that model is in our self-monitored security guide.

The order to spend in

If the budget is a weekend and a hundred dollars: long screws and a reinforced strike plate, hinge screws, then a contact sensor. If the budget stretches: a proper deadbolt, then security film on any glass within reach of the lock. After that a doorbell camera, then a smart lock, then a camera covering the approach. That order is deliberately the opposite of how most people buy, and it is the order that puts the cheap, permanent, physical fixes before the subscriptions and the batteries.