A revision of the National Program Plan for the Thermal Performance of Building Envelope Systems and Materials, first issued in January 1979, was prepared to redirect research and implementation efforts more sharply towards the needs of the building industry in the 1980s. The revision also incorporates the recommendations of a task force of industry and academic leaders established to review the initial document. This report summarizes the technical accomplishments under the Program Plan during the past three years and details the research, development, and verification projects that need to be initiated or completed in the next few years to realize the full potential energy conservation in buildings. The paper emphasizes the need for cooperation between the public and private sectors of the building community and suggests a method of accomplishing it.