The North Carolina State Building Code: Residential Code 2018 Loose Leaf – 2018, published by the North Carolina Department of Insurance, serves as the official residential construction standard referenced in licensing and exam preparation through Contractor Exam Prep. This volume aligns with the International Residential Code (IRC) framework and covers state-specific adaptations governing one- and two-family dwellings, including structural design, energy efficiency, mechanical systems, and plumbing installations. Used in coordination with NASCLA-based contractor and building inspector examinations, it is a required reference for North Carolina residential contractor license candidates preparing under the CILB-aligned Contractor Exam Prep curriculum.