ISO 9001

The VELUX factories have been certified according to ISO 9001, and a roof window is designed and manufactured in accordance with relevant international standards.

In specific areas, such as watertightness, VELUX has introduced its own standards that are stricter than international standards.

In the countries where VELUX was first established, it is still possible to find working windows that were installed more than 40 years ago - the best possible proof of durability.