Five ways to make any door more secure against break-ins

1

Get a deadbolt lock that has a horizontal bolt at least 1 inch long. Also, learn how to make your door safe from bump keys.

2

With any deadbolt lock, buy a reinforced strike plate (the metal piece on the jamb; the lock's bolt slides into it). Some reinforced strike plates are thicker than others. We recommend a strike plate that's at least 1/8-inch thick. They typically cost about $10.

3

Use 3-inch screws to mount the strike plate into the doorjamb. These will lodge deeper into the framing and help the strike plate withstand kicking and hammering.

4

Consider using a metal reinforcement that fits around the door where it's been drilled to accept the lock and knob. In previous tests, we've found such reinforcements to be very effective. They cost $5 or less.

5

If you're buying a door with glass near the doorknob or with glass sidelights, consider a double-cylinder deadbolt. You need a key to open this type of lock whether you're inside or outside, so a burglar can't just break the glass and reach in to open the door.

However, check whether your locality or homeowners-insurance carrier allows double-cylinder deadbolts. More and more municipalities are prohibiting them for fire-safety reasons.