Delaware Code
Subchapter II. Minimum Conditions of Premises and Buildings
§ 4114. Interior structure.

(a) In general. — The interior of a structure and its equipment shall be maintained structurally sound and in a sanitary condition so as not to pose a threat to the health and safety of the occupants and to protect the occupants from the environment.
(b) Structural members. — The supporting structural members of every building shall be maintained structurally sound, not showing any evidence of deterioration which would render them incapable of carrying the imposed loads.
(c) Interior surfaces. — Floors, walls, including windows and doors, ceilings and other interior surfaces shall be maintained in good, clean and sanitary condition.
(d) Lead-based paint. — Lead-based paint with a lead content of more than 0.5 percent shall not be applied to any interior or exterior surface of a dwelling or dwelling unit, including fences and outbuildings upon any premises.
(e) Bathroom and kitchen floors. — Every toilet, bathroom and kitchen floor surface shall be constructed and maintained so as to permit such floor to be easily kept in a clean and sanitary condition.
(f) Free from dampness. — Cellars, basements and crawl spaces shall be maintained free from standing water so as to prevent conditions conducive to decay or deterioration of the structure.
(g) Sanitation. — The interior of every structure shall be maintained in a clean and sanitary condition free from any accumulation of rubbish, refuse or garbage. Rubbish, garbage and other refuse shall be properly kept inside temporary storage facilities.
(h) Public halls and stairways. — Garbage or refuse shall not be allowed to accumulate or be stored in public halls or stairways.
(i) Insect and rat harborage. — All structures shall be kept free from insect and rat infestation, and where insects or rats are found they shall be promptly exterminated by acceptable processes which will not be injurious to human health. After extermination, proper precautions shall be taken to prevent reinfestation.
(j) Exit doors. — Every door available as an exit shall be capable of being opened easily from the inside.
(k) Exit facilities — Adequacy. — Stairs, porches, railings and other exit facilities shall be adequate for safety.
(l) Same — Maintenance. — All interior stairs and railings and other exit facilities of every structure shall be maintained in sound condition and good repair by replacing treads and risers that evidence excessive wear or are broken, warped or loose. Every inside stair shall be so constructed and maintained as to be safe to use and capable of supporting the anticipated loads.

Structure Delaware Code