I came across this interesting information on the internet…

Home alarm systems deter intruders from attempting break-ins. Homes without alarm systems are 2.2 times more likely to be burglarized than homes with alarm systems.
Source: The Greenwich Case: Securing Suburban Homes, Simon Hakim

Most homeowners install security systems for peace of mind, and rightfully so when you see that you are 2.2 times more likely to be burglarized without a system. And of course, you can add the benefit and flexibility of Home Automation with an HAI security-based home automation system. We also just found stats about the entry point of break-ins:

79% – First Floor Door/Main Floor Windows
9% – Garage
2% – 2nd Floor
10% – Other
Source: Hakim-Buck Study on Alarm Effectiveness

Based on these statistics, 2nd floor windows are the least likely to get broken into. Homeowners may consider evaluating the risk, and skip sensors on the 2nd floor windows. Or, if you want the convenience to monitor if all the windows are closed in your home, the cost is fairly minimal.