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Monitoring Coatings

According to the Quality and Inspection Regulations, coated glass products from an externally monitored manufacturer must be used for insulating glass units with RAL-GZ 520. For this purpose, the coating company must present the manufacturer of insulating glass units with a declaration of performance in accordance with DIN EN 1096-4 for the solar characteristics in accordance with DIN EN 410 and for emissivity in accordance with DIN EN 12898.

External monitoring of the coating company must be based on a testing and inspection programme specified by GGF. Information on the certification programme, the certified companies and certified coated glass products can be found here:


ift Rosenheim GmbH
Theodor-Gietl-Str. 7-9
D-83026 Rosenheim
Certification Programme QM 308 Coated Glass Products
Info: Free search for company, location, product, subject of certification, certificate ID (XXX-XXXXX), certificate number possible.


UBAtc asbl
Union belge pour l’Agrément technique de la Construction asbl
Rue du Lombard 42
B-1000 Brüssel
Certification programme UEAtc Guide technique pour les verres à couches
Info: Free keyword search for ATG / ETA reference, product name, manufacturer or application. ATG certificates (ATG = agrément technique avec certification) are only available for download in French or Dutch.



Kiwa GmbH

Gutenbergstraße 29

48268 Greven
Zertifizierungsprogramm für die Überwachung von beschichteten Glasprodukten
Info: Überwachte Firmen: Semcoglas Glastechnik GmbH, 17034 Neubrandenburg; Guardian Flachglas GmbH, 06766 Bitterfeld-Wolfen.



Stand: 5.4.2022, IMQ