Although it is impossible to make a building completely immune to burglary, preventive measures can deter most burglaries by making it difficult for the burglar to enter the building. Burglars generally break into doors and windows. Doors which are unlocked, have weak frames, have outside door hinges, or have glass are particularly easy to enter. These doors should be repaired, reinforced, or replaced. Entrance doors should be solid wood or metal and should have peepholes. Persons moving into a new home or apartment should change all cylinders and install all new locks. Deadbolt locks should be used. Securing windows will also deter burglars, since most burglars will not break glass to enter due to the noise involved. Different security measures are required for double hung windows, sliding glass windows, casement windows, louvered windows, and basement windows. Operation Identification helps prevent burglary when a potential thief can see stickers indicating that the property is marked. If the property is stolen or lost and later recovered, the social security number provides instant identification. Citizens should also be alert to potential crimes and should call the local police rather than taking action on their own. Illustrations and a copy of a home security survey are provided.