Voluntary Guidelines for the Identification of Visual Obstructions in the Airspace of Insulating Glass Units

These advisory guidelines may assist in the determination of unintended visual obstructions in the insulating glass unit airspace.


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.