TS EN 1748-2-1

TS EN 1748-2-1 is the part of the glass-in-building series that deals with definitions, classification, and the general physical and mechanical properties of glass ceramics. This product family consists of glass-based materials that have been controlled to form a crystalline structure, giving them a technical profile different from ordinary flat glass. The standard provides a common language for identifying and describing these special basic products in building applications.

Where glass ceramics fit in building glass terminology

Glass ceramics are glass-derived materials that are intentionally crystallised by heat treatment. That structure can give them useful characteristics such as dimensional stability, resistance to thermal effects, and selected mechanical performance, depending on the intended use. In building applications, correct classification matters because appearance, dimensional suitability, and mechanical behaviour influence installation and end use. The focus of this standard is therefore on how this product family is named and what general characteristics are used to describe it.

Products covered and the stated limits

• Defines, specifies and classifies glass ceramics for use in building.
• Addresses chemical composition, main physical and mechanical properties, and dimensional and minimum quality requirements.
• Includes quality expectations related to optical and visual faults in general terms.
• Applies to products supplied in stock sizes or in cut sizes for final end use.
• Does not apply to final cut sizes with a dimension below 100 mm or a surface area below 0,05 m².

From a general technical perspective, this kind of standard gives manufacturers, specifiers, and users a shared reference point. It clarifies what the material is, how it is described, and which broad property categories are relevant when selecting it for building use. That helps distinguish glass ceramics from other glass products and supports consistent terminology across the market.

Because this part is focused on definitions and general properties, it should be read as the technical framework for the product family rather than as a complete installation or fabrication document. It sets the descriptive basis for the material category and its principal characteristics.