In brief
An IGU seals an air or gas cavity between panes to help manage heat, sound, and condensation; performance depends on the complete assembly.
IGU construction
An IGU uses two or more panes separated by a spacer and edge seals around a dry air or gas cavity.
Key points
The cavity reduces heat transfer and can improve some acoustic ranges; Low-E or laminated components add options to the specification.
Edge details matter
Durability depends on spacer, desiccant, sealants, edge support, and frame drainage - not the glass alone.
Data to request from production
Ask for performance data for the selected build-up and its edge and installation conditions; a single-pane value cannot stand in for the completed IGU.
General guidance for product selection. Specifications and engineering details must be verified against each project's drawings and standards.
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