The exterior of a structure shall be maintained in good repair, and shall be structurally sound and maintained in a sanitary condition so as not to pose a threat to the health, safety, or welfare of the occupants.
Supporting structural members of a structure shall be kept structurally sound, free of deterioration, and maintained capable of safely bearing the dead and live loads imposed upon them.
Each foundation, exterior wall, roof, and all other exterior surfaces shall be maintained in good repair and shall be kept in such condition as to exclude rodents and other pests.
A. 
Foundation walls. Foundation walls shall be structurally sound and shall be maintained free from open cracks and breaks.
B. 
Exterior walls.
(1) 
Each exterior wall shall be free of holes, breaks, loose or rotting boards or timbers, and any other conditions which might admit rain or dampness to the interior portions of the walls or to the occupied areas of the structure.
(2) 
All exterior surface materials, including wood, composition, or metal siding, shall be maintained weatherproof and shall be properly surface-coated when required to prevent deterioration.
C. 
Roofs and drainage. The roof shall be structurally sound, and may not have defects which may admit rain. Roof drainage shall be adequate to prevent rain water from causing dampness or deterioration in the walls or interior portion of the structure.
D. 
Decorative features. All cornices, entablatures, belt courses, corbels, terra cotta trim, wall facings and similar decorative features shall be maintained in good repair with proper anchorage and in a safe condition.
E. 
Signs, marquees, and awnings. All canopies, marquees, signs, metal awnings, stairways, fire escapes, standpipes, exhaust ducts, and similar overhang extensions shall be maintained in good repair, be properly anchored and kept in a safe and sound condition. They shall be protected from the elements and against decay and rust by the periodic application of a weather-coating material such as paint or other protective treatment.
F. 
Chimneys. All chimneys, cooling towers, smoke stacks, and similar appurtenances shall be maintained structurally sound, safe and in good repair.
G. 
Exposed surfaces. All exposed surfaces of metal or wood shall be protected from the elements and against decay or rust by periodic application of weather-coating materials such as paint or similar surface treatment.
H. 
Stairs and porches. Each exterior stair, porch, fire escape, balcony, and all appurtenances attached to them shall be safe to use and capable of supporting the anticipated loads and shall be maintained in a safe and sound condition and good repair.
I. 
Windows, doors and frames. Each window, door, and frame shall be maintained so as to exclude rain and rodents as completely as possible, and to exclude wind from entering the structure.
J. 
Weathertight. Each window and exterior door shall be fitted reasonable in its frame and be weathertight. Each window shall be free of cracks and holes.
K. 
Openable windows. Each window used for ventilation or emergency escape shall be capable of being easily opened from the inside and shall be held in position by window hardware.
L. 
Insect screens.
(1) 
During the period from May 1 to October 1, every door and window or other outside opening used for ventilation purposes shall be supplied with tight-fitting insect screens.
(2) 
Exception: Upon the prior approval of the Code Official, screens may not be required for exterior doors or other types of operations which make screening impractical, such as openings equipped with air-conditioning or openings above the fourth floor. The Code Official may require alternatives to screens.
M. 
Door hardware. Each exterior door and its hardware shall be maintained in good condition. Door locks on exterior doors entering individual housing units shall be in good repair and capable of tightly securing the door.