VELUX GPL is an openable, dual action roof window designed for in-reach applications and developed for use in attics and lofts to maximise roof top views and ventilation.


Product Features:

  • Opens in two ways: the bottom handle allows for top-hung opening; while a short pull on the top control bar operates the filtered vent flap for passive ventilation even while the window is shut. A longer pull allows the sash to rotate 180° for ease of cleaning the outer pane from inside the room.
  • White pre-painted pine sash and frame
  • Complete with outer aluminium cappings and flashings for tile or corrugated iron roofs.
  • Available in 5 sizes
  • Laminated double glazing as standard
  • Insect screen available as extra

From $1046 incl GST

Dual Action Roof Window

Technical Performance

GPL roof window pitch
U-value †

Solar Heat Gain
Co-efficient †
Heat Block

WERS max 5 stars
(summer rating)
Skylight 1.30
Glass only 1.00
Skylight 0.31
Glass only 0.30
Approx 70%  
AS4285‡, AS1288
NB: For roofs below 15° pitch, roof windows need to be raised to 15° and custom flashed. VELUX can assist with technical advice and drawings (build-up not recommended in Bushfire areas). U-value (W/m²K) and SHGC calculated according to EN 14351-1:2006 + A2:2016 (window size 1140mm x 1400mm).  Except Cyclonic
BCA 2013 Vol 1 & 2 regulations (Prevention of Falls from Windows - Balustrades & Barriers): contact VELUX for information relating to restrictor devices for within-reach opening skylights.