Twentieth Century Building Materials: History and Conservation

This unique architectural reference developed by the National Park Service gives a complete rundown on major building materials introduced and used during this century. Along with the history uses and typical problems inherent in the different materials listed architects and preservationists will find valuable repair and restoration tips. Special help on researching building materials including information on testing laboratories and cross-references to Sweets Catalogue files enable the reader to accurately and effectively restore and preserve valuable properties.