(1) All exterior materials shall be installed in a professional workmanlike manner and be guaranteed to be maintenance-free for at least 10 years. Finishes upon exterior materials shall be guaranteed maintenance-free for a minimum of five years. Materials or finishes without such guarantees shall not be permitted. Guarantees shall be in writing from the manufacturer.

(2) Each dwelling shall have a site-built concrete, all-weather wood, or masonry foundation around the entire perimeter with interior supports as necessary to meet applicable building codes. The dwelling shall be permanently tied to the foundation system in accordance with applicable building codes.