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■ ■ An inspector notes the quality of the thermal insulation on a house that is under construction.

Words to Understand

blueprints: A reproduction of a technical plan for the construction of a home or other structure. Blueprints are created by licensed architects. building codes: Rules established by local, state, regional, and national governments that ensure safe construction. The National Electrical Code, which was developed by the National Fire Protection Association, is an example of a building code in the United States. infrastructure: In relation to the construction industry, the systems of a city, region, or nation such as communication, sewage, water, transpor- tation, bridges, dams, and electric. self-employed: Working for oneself as a small business owner, rather than for a corporation or other employer. Self-employed people must generate their own income and provide their own fringe benefits (such as health insurance).