All roofs of every dwelling unit shall be maintained weathertight and equipped with gutters and downspouts to a public storm sewer. The roof and flashing shall be sound, tight and not have defects that admit rain. Roof drains, gutters and downspouts shall be maintained in good repair and free from obstructions. Roof water shall not be discharged in a manner that creates a public nuisance. All replacements must match and conform to the original design or be replaced completely. However, this requirement shall be waived for existing buildings if, in the opinion of the Building Commissioner and/or the Housing Manager, the drainage does not create a nuisance on public or private property and is not causing damage to the dwelling or any appurtenant structure. (Ord. 2010-20. Passed 4-14-10.)