Lack of maintenance covers both alarm system maintenance, as well as physical site maintenance.
If you move into a new house and after six months to a year you notice that your doors start to stick, or your windows no longer open and shut as they should, it is probably due to settlement that has occurred.
This should be repaired immediately, as it may cause false alarms.
If windows and doors are not tight in their frames, the contacts may become separated or out of alignment, which can signal an alarm activation.