Locksmith emergencies are unique because almost every job a locksmith encounters is different. Even something as straightforward as replacing a lock can vary from one property to another, depending on the type of door, lock and security system involved. Repairs and emergency call-outs can be just as varied. Over time, locks, doors and other security features can develop faults or become damaged depending on how they are used and maintained. Most locksmith problems occur in three key areas: front and back doors, windows, and garages.