Product quality

VELUX roof windows are designed and manufactured for a service life of 40 years or more. 98% of installers and dealers agree that VELUX products are high-quality and reliable products.

Policy and goals

Quality is a cornerstone of the VELUX business and essential to fulfilling our vision of leading the change towards smart and healthy buildings. Our roof windows are developed for a service life of 40 years or more.


We ensure high quality in products and processes by following the VELUX Group Quality Policy and the VELUX Quality Management system based on the ISO 9001 standard.

  • In 2017, 98% of dealers and installers agreed with the statement that the VELUX Group offers reliable and high-quality products in a third-party survey carried out among 7,200 dealers/installers in 20 countries.
  • In 2017, we issued no warnings to customers regarding defective products.
  • In 2017, 0,71% of sold windows required warranty service within the first three years after purchase.

Next steps

We continue to control product and process quality along the entire value chain from purchase of raw materials to product development, production and after-sales services.

In 2018, we will implement a new, preventive quality approach that will be incorporated into our quality systems