Your windows
First-level entry windows are the second-most common entry point for burglars because it’s relatively easy to jimmy a window open, Paulsen says. And even people who are diligent about locking their doors will often leave a window cracked open, especially in warm weather.
“A locked window is often enough to deter thieves but if you need some fresh air, install a window jam that will only allow the pane to be pushed open a few inches,” he says. You can also install alarms that let you know if your window is opened or broken while you’re away, he adds.
