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

I can feel draught around my window, what should I do?

What should I do when my windows appear to be leaking?

What should I do when I have condensation on my window?

What shall I do when my manual operated window (incl. roof balcony or roof terrace) will not stay open?

Find all support information, from installation and maintenance tips to troubleshooting and repair advice for multiple window solutions.

Find all support information, from installation and maintenance tips to troubleshooting and repair advice for sloping and fixed roof windows.

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