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Architectural Glass Surface Numbers: Identify the Face Before Requesting a Coating
Glass surface numbers identify faces within a glazing construction. Use the supplier's drawing to identify the proposed treatment face instead of describing it only as inside or outside.
Updated · NANOLAB Knowledge
The key distinction
Pilkington's glossary numbers surfaces from the weather-facing side. In an insulating unit, some numbered faces are within the sealed construction and are not accessible for a site-applied treatment.
Practical checks
- Obtain the glazing construction and orientation.
- Mark the exposed face proposed for treatment.
- Confirm its existing coating and care restrictions with the glass supplier.
Example
Illustrative example: a project note says coat the inner face, but the team has not distinguished the room-facing surface from a cavity-facing surface. A numbered drawing removes that ambiguity before product selection.
Scope and limits
Do not open or modify a sealed glazing unit to reach a face. This guide does not approve a nano coating on any specific glass construction.
Related guidance
- Nano Coating on Low-E Glass: Identify the Exposed Face
- Smart Glass vs Applied Smart Film: Identify the Exposed Surface Before Cleaning or Coating
- Back-Painted Glass: Identify the Face Included in the Coating Service
- Pyrolytic and Sputter-Coated Glass: Factory Coatings Have Different Histories
Technical references: Pilkington: glass terminology. These sources describe their stated methods or products; they do not certify NANOLAB products or establish compatibility with an unlisted surface.
Discuss the intended surface with NANOLAB. Use the current product documentation for formulation-specific instructions.