Many standard locks are easy to pick or break open. Do remember that exits must remain operable for fire and life safety reasons. Install burglar-proof bars on screens, and large roof vents to prohibit access through them. However, it should be noted that aesthetic or fire safety considerations often preclude their use. If bars are used, they should be operable from interior and not limit exit or evacuation of building.
Windows are common points of entry for criminals, regardless of their height from the ground.
Burglars can open unlocked windows, break glass and unlock locked windows, saw through metal or wooden frames, or pry entire window frames from exterior walls. Heavy shrubs and vines should be kept low to the ground to reduce their potential to conceal criminals or incendiary or explosive devices. Large trees or vines should be removed to prevent criminals from climbing to upper windows, large vents, or onto the roof. Participate in formal Neighborhood Watch type programs organized by local authorities. Meet with your neighbors and security personnel assigned to your neighboring businesses.