The usual skylight size is 450 x 550mm and can be installed in roofs between 15 and 70 degrees from the horizontal.
Fitting velux roof lights.
This is a video showing the fitting of a velux roof window with instructions.
Roof window fixed into roof.
The rooftop portion of the skylight installation includes cutting the hole and fastening the skylight to the roof with the three layers of protection found in velux no leak skylights.
Or read our 12 steps below for help fitting a velux window from roof opening to vapour barrier.
Whether you have never fitted a velux roof window before and would like a basic introduction or you have been fitting velux roof windows for years and would benefit from a best practice session there is a training session to suit your needs.
12 steps to fitting a new velux window.
This is a video showing the fitting of a velux roof window with instructions.
Several of these tools can be purchased from our sister website roofinglines.