TS EN 1748-1-1

TS EN 1748-1-1 is the part of the standard that defines and classifies borosilicate glasses used in buildings and sets out the basic physical and mechanical properties associated with them. It provides the core framework needed to identify the material in building-glass applications, including its chemical composition, dimensional suitability, and minimum quality expectations for optical and visual defects.

Where borosilicate glass fits in building applications

Borosilicate glass is a special glass family distinguished by its boron-oxide content within a silica-based glass composition. In general technical terms, that composition is important because it influences the glass’s thermal behaviour and its overall resistance profile. In building use, clear identification matters so that borosilicate glass is not confused with other glass types that may have different performance characteristics and application limits.

What this standard covers

This standard defines and classifies borosilicate glasses for use in building, and it indicates their chemical composition together with their main physical and mechanical properties. It applies to borosilicate glasses supplied in stock sizes or in cut sizes for final end use. The document does not apply to final cut sizes with a dimension below 100 mm or a surface area below 0.05 m².

• Material definition and classification basis
• Chemical composition framework
• Main physical and mechanical properties
• Dimensional and minimum quality requirements
• Minimum expectations for optical and visual faults
• Applicability to stock sizes and final cut sizes

In general technical practice, a standard of this kind helps align how manufacturers, suppliers, and users identify the material and judge its basic characteristics. That makes product specification, ordering, and quality assessment more consistent in building-glass applications.