CAN/CGSB-12.8-M90

1.1 This standard applies to sealed insulating glass units for use in windows, doors and curtain walls in building envelope and to the testing of samples for the integrity and durability of the units hermetic seal only. 1.2 The requirements contained herein are applicable to glazing units composed of two or three sheets of glass and glazed in recessed openings so that the edge seals are shielded from direct weathering. 1.3 The following types of applications have not been considered in the preparation of this standard. a. Testing of insulating glass units for structural adhesive glazing where the unit edges are exposed. While insulating glass units for these applications should be tested for seal durability to this standard, separate specifications, standards and testing are required to ensure the integrity of the seals and adhesive bonds when directly exposed to solar radiation and weathering. b. Testing of permanently vented or "Capillary Tube units." c. Testing of units containing grills, blinds, or any other inserts.