Multiple roof windows, 2in1, 3in1, and more
Find all support information, from installation and maintenance tips to troubleshooting and repair advice for multiple window solutions.
VELUX Support
Vertical duo
Find all support information for your vertical duo solution here, from installation and maintenance tips to troubleshooting and repair advice.
Self-service guides for vertical duo
What should I do when I have condensation on my window?
I cannot open / close my VELUX roof window
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?
Products related to vertical duo
Sloping and fixed
Find all support information, from installation and maintenance tips to troubleshooting and repair advice for sloping and fixed roof windows.
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