The name Roofart represents the products of the group VKR Holding, the market leader in the field of roof windows, supporting brands such as Velux and Altaterra. As part of the VKR Group, we have 75 years of experience in manufacturing and innovation of roof windows, as well as access to the largest production capacities in Europe. We care about the workmanship of our products using only high quality, ecological materials.

Founded in 1965 by Villum Kann Rasmussen (1909-1993), the inventor of Velux roof windows, it holds numerous “model companies”. Remaining in the hands of the Rasmussen family, VKR supplies its windows all over the world with the help of 15,000 employees from 41 countries.



“Building this company is not my achievement, but rather the creative and talented people gathered around it” Villum Kann Rasmussen, 1965




The company prides itself on providing the latest solutions in the field of roof windows to 30 countries in Europe. Altaterra, founded in 2001 as a sister company for Velux windows, which also owns the DAKEA brand, employs 130 employees from 12 countries around the world.

It revolutionises the European window market, offering a longer warranty and wider functionality than competing brands.



Production Materials and production techniques Partner institutions

SO 9001

Quality control systems


ISO 14001

Environmental control systems


OHSAS 18001

Occupational safety systems



Production equipment and production process (part of the CSTB certificate)


Production methods and market solutions



Certificate for the Dutch market



Certificate confirming that the wood used in our windows comes from sustainable sources.




Fire resistance, soundproofing


IFT Rosenheim

U-value, air and water permeability



U-value, surface temperature




Part of the VKR holding group is the VILLUM FONDEN foundation for non-profit projects in the fields of science, culture and environmental protection, as well as The Villum Window Collection, which offers visitors a rich collection of paintings and numerous expositions directly related to the subject matter. Particularly noteworthy is the one on history of windows, which covers the period from the Stone Age to the present day.