Insulating glass units
This standard applies to sealed insulating glass (IG) units used in windows, doors and curtain walls in building
envelopes. It includes requirements for the testing of samples for the integrity and durability of the unit’s hermetic
seal and if applicable, gas concentration.
The requirements contained herein are applicable to glass units consisting of two or three sheets of glass and
glazed in recessed openings so that the edge seals are shielded from direct weathering. The requirements also
apply to glass units that may be coated, have muntin bars within the cavities and contain air or argon gas within the
The testing of permanently vented or capillary tube units are not included in this standard.
A User’s guide is found in Annex D as an aid in the application of this standard.
The testing and evaluation of a product against this standard may require the use of materials and/or equipment
that could be hazardous. This document does not purport to address all the safety aspects associated with its use.
Anyone using this standard has the responsibility to consult the appropriate authorities and to establish appropriate
health and safety practices in conjunction with any applicable regulatory requirements prior to its use.