178 Neb. Admin. Code, ch. 1, § 002
All buildings shall be structurally sound, in good repair, and of adequate size for their intended use.
All outside openings of permanent structures, except maintenance buildings, shall be effectively screened, including outward-opening, self-closing doors equipped with screens, unless other effective means are provided to prevent the entrance of insects and rodents. This provision also applies to all permanent structures and shelters used for sleeping quarters which facilities must be protected against the elements.
Lighting and ventilation shall be adequate for the purpose intended.
Walls, floors, and ceilings shall be of smooth, durable, non-absorbent, and easily cleanable construction and kept clean and in good repair.
178 Neb. Admin. Code, ch. 1, § 002