We spend a lot of time here at NoPryZone talking about cylinders, pins, and pick resistance. And that's all real — a good lock cylinder genuinely matters. But there's a dirty secret buried inside every home security conversation: most residential burglaries don't involve lock picking at all. They involve a foot. Your door frame is 3/4-inch pine trim nailed to a stud, with a two-inch strike plate held in by screws that are barely longer than your thumbnail. One determined kick and that assembly flies apart in about two seconds.
The good news is this is one of the cheapest and most impactful security upgrades you can make. We're talking $10 to $50 and maybe 30 minutes of your time. No locksmith, no contractor, no permits. Just a drill, a screwdriver, and a trip to Home Depot or Canadian Tire.
Why Your Door Frame Fails
Look at the strike plate on your door — that's the metal piece mounted on the frame where your deadbolt bolt slides into. Almost every home in North America has a standard 2¼-inch strike plate held in by two screws. Those screws are usually 3/4 to 1 inch long. That's it.
Here's the problem with those screws: they only bite into the door casing — that decorative trim board running around the frame. Behind the casing is an air gap of up to 3 inches, and then the structural 2×4 stud. The trim is soft pine. It splits like balsa wood under impact. When someone kicks your door, the force concentrates on those two tiny screws, the pine splinters, the plate pops, and they're inside.
The lock didn't fail. The wood gave up. A $100 deadbolt on an unreinforced frame is essentially a high-security padlock on a cardboard box.
— NoPryZone Security AnalysisA standard residential door can be kicked in by an average adult in 1–3 kicks. Police "ram" tools open most residential doors in a single hit. None of this has anything to do with the quality of your lock cylinder.
The Three Upgrades — Pick One or Do All Three
These three fixes can be done independently or stacked. Option 1 alone is a significant improvement. All three together make your door genuinely difficult to force. We've listed them in order of cost and effort.
This is the single best security-per-dollar upgrade in home security, full stop. Remove the 3/4-inch screws from your deadbolt strike plate and your hinge plates. Replace them with #8 or #9 × 3-inch hardened wood screws. That's it.
Those longer screws bypass the decorative trim casing and drive all the way through into the structural 2×4 stud behind the frame. Now a kick has to split the entire wall framing to open the door — not just a pine trim board. The force required goes up dramatically.
Pro tip: Drill a 1/8-inch pilot hole first. Without it, you risk splitting the stud itself driving the screw in, which is the opposite of what you want. One pilot hole per screw, 30 seconds each, problem solved.
Step up from the standard 2-inch strike plate to a 12-inch (or longer) heavy-gauge steel security strike plate — the Prime-Line U 9476 is the most widely available option. Instead of two screw holes, these use six to nine screws spread over a full foot of the door frame.
The physics here are straightforward: the wider the plate, the more wood is engaged under impact load. A kick that would concentrate enough force to split one small section of trim now has to split a foot of framing all at once. It won't. Combine this with 3-inch screws (Option 1) and you've dramatically improved your door's resistance.
Note: Measure your door jamb before buying — most are 1-3/8 inch or 1-3/4 inch. Get the right size or it won't seat flush.
Options 1 and 2 protect the frame. This one protects the door itself. Many interior and exterior doors — especially older ones or hollow-core doors — are thin enough that a kick can actually split the door around the lock, even if the frame holds. The Defender Security U 9539 / U 9589 Door Reinforcer is a U-shaped steel sleeve that wraps over the edge of the door around the lock area.
It sandwiches the wood from both sides of the door face, making it nearly impossible for the lock area to split under impact. Think of it as a cast for the door's most vulnerable point. Check your door thickness before ordering — 1-3/8 inch and 1-3/4 inch are the two common sizes and they're not interchangeable.
The Comparison: What Each Fix Actually Buys You
| Upgrade | What It Protects | Cost (CAD) | Difficulty | Impact |
|---|---|---|---|---|
| 3-Inch Screws | Strike plate anchor point | $12–18 | Beginner | Very High |
| 12-Inch Strike Plate | Full door frame area | $11–22 | Easy | High |
| Door Reinforcer | Door itself (lock area) | $22–30 | Easy | High |
| All Three Combined | Frame + door edge + anchor | $45–70 | Easy | Excellent |
| New Deadbolt Only | Lock cylinder only | $60–200+ | Moderate | Low (vs kicking) |
Don't Forget the Hinges
Most people reinforce the lock side and call it done. But if your door swings outward — or if an intruder is patient enough — the hinge side is just as vulnerable. Hinge pins can be popped on outswing doors, and hinge plates are almost always held in with the same short, soft screws as the strike plate.
The fix is the same: pull the screws from each hinge and replace them with 3-inch versions that reach the stud. All three hinges, all four screw holes per hinge. Add this to Option 1 and you've covered both sides of the door for under $20 total.
Stack two quarters on top of each other and try to fit them in the gap between your door and the frame. If they fit easily, your door has enough clearance to benefit from a Jamb Shield (like Door Armor or similar) — a full-length steel channel that replaces the entire door jamb. It's a more involved install but it's the gold standard for frame reinforcement, especially on older or poorly-fitted doors.
Installation in Under 30 Minutes
You'll need a cordless drill, a 1/8-inch drill bit, a Phillips screwdriver bit, and your new hardware. That's it. No special tools, no experience required.
Back out the existing screws from your deadbolt strike plate and latch plate. Set them aside. If you're also replacing the plate itself (Option 2), remove the old plate completely and position the new 12-inch plate.
Using your 1/8-inch bit, drill into each screw hole at a straight angle. You're drilling through the casing and into the stud behind it — you'll feel the bit hit harder wood when it reaches the stud. Go in about 3 to 3.5 inches total depth.
Thread your 3-inch screws in by hand first, then drive them with the drill at low speed. You want them snug but not overtightened — you're not trying to compress the wood, just seat the plate firmly. Check that the door still latches cleanly after.
Do the same thing on every hinge plate. One pilot hole per screw hole, one 3-inch screw per pilot hole. Your door is now substantially harder to kick in from both sides.
- Strike plate anchored into structural studs — not trim
- Force of a kick distributed across 12 inches of framing (if you added the plate)
- Door edge protected from splitting around the lock (if you added the reinforcer)
- Hinges secured to studs on the opposite side
The Lock Was Never the Bottleneck
A $150 Schlage B60N on a standard, unreinforced door frame offers roughly the same kick-in resistance as a $30 Kwikset on the same door. The cylinder is excellent. The wood it's mounted to will fail first either way.
For $10 to $15 and 20 minutes, a box of 3-inch screws addresses what is genuinely the #1 residential physical security vulnerability. You don't need to replace your lock. You need to fix what your lock is attached to. The screws alone are probably the highest-return security investment per dollar you can make on your home — no debate.
If you want to go further, stack the 12-inch strike plate on top and add the door reinforcer. You'll have spent under $50 and upgraded your door from a liability to something that will genuinely slow down or redirect an opportunistic intruder. That's the whole game.