considering purchasing a velux window to install in flat roof of extension.
It appears that the tru FRS version costs twice the price
of the same size window for a pitched roof. Admittedly it comes with
an insulated wooden kerb (plinth) for the window to sit and flashing.
Looking at the wooden kerb it doesn't seem a difficult thing to make
and was wondering if anyone had used the bog standard GGL windows
and made them fit a flat roof.
Making the plinth seems fairly straight forward but from what I can
see it would be the flashing that would be the difficult thing to
Has anyone achieved this, just seems very expensive to pay twice
the price when its only the flashing that is different or can you buy
the flashing on its only.