Home Security: How to Increase Entry Door Security

Install reinforcing hardware on your door and jamb to stop burglars

Install special door and jamb reinforcement plates to keep burglars from breaking into your home. It only takes an hour.

By the DIY experts of The Family Handyman Magazine

Install door reinforcement hardware

You can spend hundreds on a fancy “pick-proof” dead bolt for your entry door. But you're kidding yourself if you think that'll stop most burglars. The truth is, most don't know how to pick a lock. They gain entry with one really well-placed kick or body slam that splits the doorjamb (and often the door as well), and they walk right in. You can stop burglars in their tracks by beefing up your door and jamb with reinforcing hardware. The components cost about $120 and take about an hour to install. Here's how to do it.

Start by measuring the entry door thickness and the spacing between the entry knob and the dead bolt cylinder. Then buy either a single or a double wrap-around door reinforcement plate kit (less than $20 at any home center or hardware store) and four 1-1/2-in.-long stainless steel wood screws. Then get a doorjamb reinforcement kit (StrikeMaster II is one brand; around $80 from homedepot.com or through our affiliation with amazon.com).

Remove the entry knob and dead bolt cylinder. Then remove the dead bolt and latch and toss the short screws. Install the wrap-around door reinforcement plate and reinstall the latch and dead bolt plates using the longer stainless steel screws (Photo 1).

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Install jamb reinforcement hardware

Next, mark both the latch and the dead bolt “centers” on the strike side of the jamb (Photo 2). Remove the latch and strike plates and weather stripping from the jamb. But leave any weather stripping that's attached to the door stop. Then align the reinforcement plate, predrill a few mounting holes and add screws (Photo 3). Check the reinforcement plate alignment before snugging the screws by hand. Do not overtighten.

If the prescored dead bolt knockout lines up with the marking along the jamb, remove it and finish installing the remaining screws. If it doesn't line up, drill a new dead bolt hole with a 3/4-in. bimetal hole saw. Finally, replace two screws in each hinge with the longer screws provided in the kit.

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Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

  • Tape measure
  • Drill/driver, cordless
  • Drill bit set

You also might need a 3/4-in. bi-metal hole saw.

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

  • Door and jamb reinforcing plates