 The rest of the membership works in closely related specialties such as sales and marketing, housing finance, and building materials manufacturing and supply.Each year, NAHB members build approximately 80% of new homes constructed in the United States.NAHB's various groups analyze policy issues, take the industry's story to the public through the media and other outlets, monitor and work toward improving the housing finance system, analyze and forecast economic and consumer trends, and educate, train and disseminate information to members.