
Installation of a roof window
16 VELUX
2
Establishing opening
POSITIONING THE WINDOW IN
THE ROOM
Position the window in the room considering:
• the use of the room
• a clear view when standing and/or when
seated
• comfortable operation (centre-pivot or
top-hung window)
• requirements regarding sill height,
see chapter 1
• vertical wall, if any, see page 59
• optimum design of linings
• building regulation requirements
HOLE IN THE ROOF
If there is no access to the roof from the
outside, establish a hole in the roof surface
by cutting a small hole, approx
400 x 400 mm, from the inside and
through the roof construction. When bat-
tens have been cleared, the final position of
the window in the roof construction can be
determined. When measuring, remember
to allow space for insulation around the
window frame.
POSITION OF TOP, BOTTOM AND
SIDE TRIMMERS – see chapter 4
POSITIONING THE WINDOW
If possible in order to minimise adjustment
of the roofing material, adjust the position
of the window sideways allowing for rec-
ommended distance to rafter (support) (a)
and roofing material (b).
a
b
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