Maintenance. The exterior walls and roofs of buildings shall be maintained in a clean, orderly and attractive condition, free of cracks, dents, punctures, breakage, and other forms of visible marring. Materials that become excessively faded, chalked, cracked, chipped, damaged or otherwise deteriorated shall be replaced, refinished, repaired or repainted in accordance with the reasonable determination and order of the Building Inspector within 60 days' notice of such defect.