The doors and windows of your house are the critical access points of your home. What does this mean? It means that these are the two area the a burglar would or could get into your home. It is vital to the security of you and your family to make sure that these two areas are secure.
You want to make sure that their are 1-inch throw deadbolt locks on all exterior doors. This will help prevent a burglar from simply pick locking the door to get in. Many homes are constructed with these locks, but not all.
Make sure doors do not have too much space between the door and the frame. Burglars can use a jimmy to access these doors. If the door has a bad gap, the burglar could even use a credit card to access the door.
Sometimes a door is installed with the hinges on the exterior. All a burglar has to do in this case is pop out the hinge pins. Not really sure why someone would install a door like that, but it does occasionally happen.
Glass patio doors can present an access problem. Many of them can simply be lifted off of the track and removed. Burglars know this and so you have to take action. The best bet is to make sure you have heavy weight glass and to lay a piece of wood or metal in the track so the door cannot be opened.
Windows should be protected with good locks, and should have small glass panes instead of big ones. Bigger panes allow burglars to simply break the glass, reach in and unlock the door. If possible, install safety glass in all first story windows.
Taking these simple precautions can help deter burglars from even attempting to break into your home. It will protect your family and make you safer, because you are safer.
Another thing that makes windows so accessible is the fact that their on ground level. Some houses are being built where the first story windows are actually a half story off of the ground. This means that if a person stands at a first story window, the bottom of the window would be about top of head level. This makes it extremely difficult for would be robbers.