North American Glazing Guidelines for Sealed Insulating Glass Units for Commercial & Residential Use

These advisory guidelines address the importance of good glazing practices and are intended for use by those who design, specify, manufacturer and install insulating glass units. These guidelines address glass types, framing, glazing clearances, setting blocks, spacer shims, glazing materials, glazing systems, receiving, storage & handling, glass protection & cleaning for both commercial and residential applications.


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.