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What's the level of light transmittance?

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What's a vapor barrier?

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What's glass made up of?

Did you know that 60% of glass is sand? There is also 20% sodium carbonate and sulfate, and 20% dolomite and chalk. 





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


ISOGON has DIN EN ISO 9001 certified quality management system


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









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