VELUX GGL is an openable, centre-pivoting roof window for in-reach applications used to bring natural light and air into attics or lofts where ventilation is required.


Product Features:

  • A short pull on the top control bar allows filtered passive ventilation even while the window remains shut. 
  • A second pull on the control bar allows the window to rotate for maximum ventilation – and up to 180º for 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

From $886 incl GST

Roof window GGL

Technical Performance

Skylight Installation Pitch
GGL roof window sizes
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
Aprox 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).  
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.