What is BS EN 1096‑4 - Coated glass in building about?
BS EN 1096‑4 is part four of a multi-series of European standards on glass in building that covers the product standard of coated glass.
BS EN 1096‑4 covers the assessment and verification of constancy of performance (AVCP) of coated glass for use in buildings.
Note: For glass products with electrical wiring or connections for, e.g. alarm or heating purposes, other directives, e.g. Low Voltage Directive, may apply.
Who is BS EN 1096‑4 - Coated glass in building for?
BS EN 1096‑4 on coated glass in building is useful for: 
- Glass in building manufacturers
- Glass coating manufacturers
Why should you use BS EN 1096‑4 - Coated glass in building?
Coated glass is an industrial glass product onto which metal oxides are sprayed in the form of thin coatings (0.01 µm to 0.8 µm). The coating is thus composed of a stack of sub-coatings of different types and thicknesses. It modifies the behavior of the glass with respect to solar radiation, in the visible and infrared domains. On distinguishes between pyrolitic and magnetron coatings. The latter can only be used on the internal surface of insulating glazing
In addition to the ultraviolet radiation reduction, coated glass offers several other benefits, including higher levels of comfort – low-e glass coatings reduce radiant heat. Potential savings on your energy bills – low-e glass coatings reduce reliance on heating and cooling systems.
BS EN 1096‑4 covers the assessment and verification of constancy of performance (AVCP) of coated glass for use in buildings which is a harmonized system defining how to assess products and control the constancy of the assessment results. This system can help you safeguard the reliability and accuracy of the declaration of performance.
What’s changed since the last update?
BS EN 1096‑4:2018 supersedes BS EN 1096‑4:2004, which is withdrawn.
BS EN 1096‑4:2018 includes some technical changes with respect to BS EN 1096‑4:2004. These are:
- The standard has been revised to fulfil the requirements of the Regulation (EU) No 305/2011 (Construction Product Regulation), modified by Regulations (EU) No 157/2014, (EU) No 568/2014 and (EU) No 574/2014
- The tolerance on emissivity is reduced to +0,01 for coated glass with a declared normal emissivity lower than 0,10
- The solar factor, g, is listed within the spectrophotometric characteristics to be declared in the Declaration of Performances (DoP)
- The durability/conformity assessment is listed within the characteristics to be declared in the DoP
- The mechanical resistance shall be given in the DoP by the characteristic bending strength of the glass substrate
