Documentation material

Specification details

VELFAC products and technical details are available in NBS source – the new platform that combines the NBS BIM Library, NBS Plus and Product Selector. Visit NBS source to find, select and specify VELFAC windows and doors for your project, quickly and efficiently.

Declarations of performance – DoP

CE and UKCA marked building materials must be accompanied by declarations of performance (DoP), which you will find here.


Operation and Maintenance

Our Operation and Maintenance guide provides an introduction to VELFAC products along with detailed maintenance, emergency, decommissioning and health & safety information. 


User guide

The user guide contains information on how to operate and care for VELFAC windows and doors. By following those instructions, users will be able to enjoy them for many years to come.


Any questions?

Contact the VELFAC specification team

Our specification team is here to help you. We can work with you to maximise the design potential of the VELFAC system, and can even oversee the entire design process – a ‘no risk’ route to a trouble-free installation.