25 Year Field Correlation Study Report (1980 - 2005)

Jointly sponsored by the Department of Housing and Urban Development and the Sealed Insulating Glass Manufacturer Association (now IGMA), the study field evaluated ASTM E774 Standard – certified insulating glass units. This study includes two phases. The initial study started in 1980 and Phases 2, started in 1990 incorporating newer technologies.


IGMA is the trade association representing the interests of the Insulating Glass industry not only in North America but worldwide. Our focus is on developing and advancing new technologies in the manufacture of insulating glass units through development of codes and standards, topic industry publications, education, product certification and leading edge research.