arh,
In North America we call uPVC simply vinyl. A lot of folks in our part of the world wouldn't know what uPVC means.
Regular windows are not designed to be used as skylights. There are a number of technical differences between windows and skylights that make the use of one as the other impractical and potentially dangerous (for example a skylight must have safety glass, a window may not need it).
I wouldn't do it.
In North America we call uPVC simply vinyl. A lot of folks in our part of the world wouldn't know what uPVC means.
Regular windows are not designed to be used as skylights. There are a number of technical differences between windows and skylights that make the use of one as the other impractical and potentially dangerous (for example a skylight must have safety glass, a window may not need it).
I wouldn't do it.