All persons contracting or engaging in or working at the trade or occupation of roofing through a permit issued under this chapter shall conform to the following specifications:
(a) Three layers of roofing materials shall be permitted only if a report is submitted to the Building Commissioner from a structural engineer.
(b) Two layers of roofing materials shall be permitted on buildings. Weight is based on 235-pound shingles.
(c) Number 15 felt underlayment shall be considered the minimum acceptable underlayment. (Ord. 39-1994. Passed 5-9-94.)