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What does U-value mean?

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What's the level of light transmittance?

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What's the level of light transmittance?

It describes the percentage of sunlight, which is transmitted from outside to inside through a glass pane. A simple 4 mm glass sheet has a light transmittance of 85%. A heat-insulating glass pane (2X4 mm, 16 mm gap) with the proper K value of 1.1 lets pass at least 76% of the light.





Our website is CO₂-neutral.
Thereby we reduce the CO₂-emission.


Our windows carry the
CE-mark which indicates the conformity of the product
to the European guidelines.


For our PVC Windows and Doors we only use Materials "Made in Germany".









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