Every exterior opening shall be fitted with a window, door or basement hatchway cover,
as appropriate, which shall be tight and maintained in sound condition and good repair
to exclude wind and prevent the entrance of rodents, rain and surface drainage water
into the dwelling or structure. Every doorway which gives access from a habitable
room or dwelling unit into a common passageway, hall, stairway or the exterior shall
be fitted with a door, equipped with hardware capable of ensuring security and privacy
to the occupants of such habitable room or dwelling unit.