The perimeter component that separates IGU lites and helps establish cavity width, edge-seal geometry, and often a reservoir or path for desiccant.
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Meaning and boundaries
Spacer material, color, construction, corner design, and thermal performance vary; it is not merely decorative trim.
Why it matters in glass restoration
Spacer position and condition help identify the unit edge and can reveal fabrication features that must not be mistaken for failure.
Related terms
References
- National Glass Association — GANA Glazing Manual, 2022 edition
Publisher’s original source - National Glass Association and FGIA — Compatibility Testing of IG PIB Primary Sealant with Respect to Glazing Materials
Publisher’s original source - National Glass Association — Guidelines for Appearance of IGU Edges in Commercial Applications
Publisher’s original source