"The instructions that come with this are not usable. They say to do a few things first, then up end and stand the window on the polystyrene protectors, to click the release buttons and the frame will separate from the window. With three of us involved, we could not get frame free.
I phoned Velux and they proved useless and dismissive that I had the skills which annoyed me. I was left with no alternative but to go to my nearest Screwfix branch (St Neots) where I got the help of the store manager Ken, who was very customer friendly. He, my step son and I spent the best part of another hour trying to get the frame to release from the window to no avail.
As it stands, I do not think this is fit for the purpose. It is like a car without a key. You can't get started. The instructions are lousy and make intuitive leaps that do not hold up in practice. The online videos likewise trivialise and do not give enough detail.
Not good enough and left me with an open roof for several days. I am not happy and my rating expresses that.
Mostly I am angry with the support offered by Velux. There was none that was of any use.
I am a diyer, but have tackled most other projects from major to minor with little trouble. I am normally very capable and have taken older Velux centre tilt windows out for repair before with few problems.
This window was a replacement for an old GGL4 window where the hinges on one side had got jammed due a loose screw and in the process caused the tiltable window's frame to split when inadvertently forced. I think that there is a design flaw in the length and positioning of the screws attaching the hinge to the outer frame in the previous GGL4 design and I am not sure that this has been corrected.
If I were to rate Velux on outcomes, I would say they are teetering on being struck out.
The window is not fit for the purpose with the instructions given."