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Evidence-based confirmation of the glass construction and treatment relevant to the proposed work.
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Meaning and boundaries
Appearance alone rarely proves whether glass is annealed, heat-strengthened, tempered, laminated, insulating, chemically strengthened, or specialty glazing.
Why it matters in glass restoration
Glass type affects fracture behavior, coatings, edge and surface sensitivity, legal requirements, and referral decisions.
Related terms
References
- National Glass Association — GANA Glazing Manual, 2022 edition
Publisher’s original source - National Glass Association — Marking and Labeling of Architectural Glass
Publisher’s original source - ASTM International — ASTM C1048-25: Heat-Strengthened and Fully Tempered Flat Glass
Publisher’s original source - ASTM International — C1172 — Standard Specification for Laminated Architectural Flat Glass
Publisher’s original source