John Leeke is a Preservation Consultant. http://www.historichomeworks.com/hhw/index.htm He has been helping contractors, homeowners and all types of professionals maintain and restore their historic buildings and structures. He has authority on preservation techniques and materials. Historic preservation takes a long-term view that saving our material culture is important. It saves historic buildings through the combined efforts of politics and legislation, academics and historical study, building science and research, the construction industry and building trades.