Become a quality label user in the Flat Glass Association


Are you interested in becoming a member?

The GGF has room for competent contractor glass.

What do you get out of it? 

  • You demonstrate to your customer with the RAL quality mark that you sell verified quality – we award a new certificate for that every year.

  • You can offer window manufacturers with the RAL quality mark the verified insulating glass they need – no quality-tested window can go without quality-tested components!

  • You get certainty about the preliminary products you use – thanks to our new external monitoring system for spacers, desiccants and sealants operating since 2016.

  • Coated glass has been subjected to external monitoring by GGF for years now – that means you get closer tolerances for emissivity than are required by the standard.

  • External monitoring gives you certainty about your production and reduces your fault costs – we work together with the institutes MPA Darmstadt, KIWA Glaslabor Magdeburg and ift Rosenheim.


Why should you support GGF with your membership? 

  • We set quality standards.

  • We are the recognised platform for all questions on product quality and suitability for use when it comes to insulating glass and its preliminary products.

  • We are where the manufacturers of these products come together to tackle quality-relevant questions.

  • Our Quality Committee is elected by the members' meeting and is committed to neutral external monitoring by the institutes. It monitors the conditions required for displaying the quality mark.

  • We cooperate with other quality associations concerned with windows – for a continuous quality chain.

Find here Articles of Association – as last amended – and the Quality and Testing Standards. For additional information, please contact our administrative office or our Board of Directors

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