Most common means of breaking into homes is simply by kicking in the door. Most doorframes are made of 1 inch pine which saves the contractor money. Multiple locks and bracing under the molding will make it much more difficult to enter by breaking down the door, but still if your door is pretty flimsy, it will be relitively easy to put a sledge hammer through your door, and gain entry.
Take a good look at your access points such as your front and back door, and gates. An intruder doesn't care how much damage they cause, just so long as they can get in. A pinewood door frame will splinter and give way after a few savage kicks. The backdoor deadbolt can often be bypassed if your doors have decorative windows. Gates can be opened by simply reaching around and over.
Brace Your Entry Doors-
Take flat steel stripping (1/8 x 2 inches is good) and drill a staggered series of holes down its length. When you take the interior molding off the door -- in most houses -- you will see the 1x6" (or 1x5") pine plank of the doorframe. That is nailed to the 2x4" studs of the wall. (You may or may not be able to see the studs because of drywall, but they are there). That thin 1 inch piece of cheap wood (it is usually pine) is all that was between your possessions and a burglar. A few savage kicks, and it usually breaks off in a 2- to -3 foot sliver and the door swings open.
Take flat steel stripping (1/8 x 2 inches is good) and drill a staggered series of holes down its length. When you take the interior molding off the door -- in most houses -- you will see the 1x6" (or 1x5") pine plank of the doorframe. That is nailed to the 2x4" studs of the wall. (You may or may not be able to see the studs because of drywall, but they are there). That thin 1 inch piece of cheap wood (it is usually pine) is all that was between your possessions and a burglar. A few savage kicks, and it usually breaks off in a 2- to -3 foot sliver and the door swings open.
This information is very good. The photo’s give you exact idea. You will get more information on following web page regarding doors & locks.
http://www.securityhunt.com/home-security-door-locks.html
regards
Sumukh