Modern multi-pane insulating glass is a technically complex product facing a wide variety of challenges. Sound, insulation and safety are the most important ones. Subsequent repairs to or maintenance of insulating glass products are impossible.
Therefore, the quality of an insulating glass product must already be assured during the production process (raw materials and production) to guarantee high quality for the product's entire life-cycle.
More information on multi-pane insulating glass can be found here.