No person may for a consideration install, alter or restore, within any unincorporated part of the county and within any city pursuant to the authority granted in G.S. 153A-122, any insulation or other materials or energy utilization equipment designed or intended to meet the state building code requirements for insulation and energy utilization standards who is not:
(1) Licensed as a contractor to do the proposed work under G.S. ch. 87.
(2) Working under the supervision of a registered architect or professional engineer;
(3) An owner working upon his own building; or
(4) Licensed under this article.
(Ord. of 1-1-1978, § 2)