Here are some links to relevant websites concerning homes, home inspections, energy efficiency, and other related topics.
NC Home Inspector Licensure Board
NC Home Inspector Standards of Practice
EPA's Citizens' Guide to Radon
Life Expectancy of Building Components and Appliances
DOE Energy Codes--How efficient is your home?
Polybutylene (Qest) Pipe Class Action Suit
Advanced Energy--all about energy usage for North Carolina homes