Multiple window combinations - 2in1, 3in1, and more
Find all support information - from installation and maintenance tips to troubleshooting and repair advice for multiple window solutions.
Self-service guides for vertical duo
Safety guideline to find type sign / gather product information on your VELUX windows or accessories
How should I measure correctly the height of my VELUX roof window?
What should I do when I have condensation on my window?
Important product safety warning & replacement information for VELUX sloped roof window
Products related to vertical duo
Sloping and fixed (VELUX sloping extension)
Find all support information - from installation and maintenance tips to troubleshooting and repair advice for sloping and fixed roof windows.
Sloping and vertical (VELUX facade extension)
Find all support information - from installation and maintenance tips to troubleshooting and repair advice for sloping and vertical roof windows.
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