All Townhouse Buildings shall have a dual pitched, single ridge roof (such as gable, hip, gambrel or mansard roof) with a minimum pitch of one (1) foot vertical to six (6) feet horizontal, and no flat roof shall be permitted; provided, however, that where roof mounted equipment is necessary and/or preferable for the operation of the building, a façade roof treatment exhibiting the appearance of such a dual pitched, single ridge roof is permitted.