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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.
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For our PVC Windows and Doors we only use Materials "Made in Germany".
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ISOGON has DIN EN ISO 9001 certified quality management system
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Our windows carry the
CE-mark which indicates the conformity of the product
to the European guidelines.
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