Twenty five percentage of burglars use an entry other than a window or a door. Check around your building for easy access to the roof. Trees close to the building, fire ladders, and telephone poles can provide burglars with a secluded area to enter your building. Burglars feel safe if they bypass the doors and motion detectors because the those alarms will only sound as they are leaving. Consider investing in a silent system that will activate BEFORE the burglar enters the building.