By Anne E. Grimmer, et al. These are the first set of official guidelines on how to make changes to improve energy efficiency and preserve the character of historic buildings. The Guidelines are an important addition to current discussions about sustainability and achieving greater energy efficiency, which have focused primarily on new buildings to date. This authoritative guide enhances overall understanding of basic preservation principles. Shows specific examples of appropriate treatments and the consequences of inappropriate treatments. Also, includes list of technical guidance publications. Other related products: Improving Energy Efficiency in Historic Buildings is available here: https://bookstore.gpo.gov/products/sku/024-005-01294-0?ctid=1317 A Do-It-Yourself Guide to Sealing and Insulating With Energy Star: Sealing Air Leaks and Adding Attic Insulation is available here: https://bookstore.gpo.gov/products/sku/055-000-00684-9 The Seismic Rehabilitation of Historic Buildings is available here: https://bookstore.gpo.gov/products/sku/024-005-01322-9 Renovation & Historic Preservation resources collection can be found here: https://bookstore.gpo.gov/taxonomy/term/447/renovation-historic-preservation Real Estate product collection can be found here: https://bookstore.gpo.gov/catalog/consumer-home-family/real-estate