You are a planner, architect or developer?

Here is some useful information on plastic windows and quality and testing. Our Annual Reports can be viewed here.

Are you a window manufacturer?

This is where you can find out more about quality-assured plastic window profile systems and components as well as a brief overview of the relevant guidelines, ordinances and laws.

Are you a member?

This is where we tell you about planned meetings of the expert groups and provide agendas and minutes for you to download. We have also collected information about our projects in this area.

About us

RAL-Gütegemeinschaft Kunststoff-Fensterprofilsysteme e.V. (GKFP) is an association that performs and provides neutral and external quality monitoring and product certification for its member companies in the form of voluntary self-regulation. Its aim is compliance with the highest product quality standards in order to ensure the lasting fitness for use of the manufactured products. Products that are certified by the GKFP are allowed to carry the RAL quality mark and be used as components for such products. Opens internal link in current windowmore about us

Recommended Dates

28. + 29. March 2019 | Opens external link in new windowwindays 2019: event of the Bern University of Applied Sciences in Biel



Record number of visitors for "glued window constructions

On 24 January 2019, almost 100 visitors took part in the joint symposium of...[more]


Webinar Dates 2019: Revision Technical Appendix

In January and February 2019 the office of the Gütegemeinschaft offers three...[more]


General Assembly meeting 2019 with new concept

From now on you can reserve your hotel room for the event. The General Assembly...[more]