The preservation of pigmented structural glass remains more a materials issue than a detailing problem. The glass panels were and are extremely susceptible to breakage due to accident or vandalism. In addition, many of the historic installation materials such as the mastic adhesive and joint cement did not possess a long lifespan. Periodic maintenance, inspection, careful repair, and selective replacement--in like kind--are essential for the longevity of any historic pigmented structural glass veneer.
Carrara Glass, Sani Onyx, and Vitrolite were integrally linked to the architecture and interior design of the 1930s and 1940s and helped to define what was "modern." Thus, every effort should be made to preserve this significant historic material in both the innovative buildings of the Art Deco, Streamline, and Modern styles as well as the "modernization" of earlier structures.