Main overview combi solutions

The VELUX Duo Vertical Extension features a roof window with a vertical extension window installed directly below it. The addition of a vertical window boosts the feeling of space and provides an extended view to the outdoors. The increased window surface also lets in more natural daylight to brighten your home in new, exciting ways. The solution can also be configured as a Quattro, with two rows of Duo Vertical Extension combi solutions connected together.

Benefits at a glance

• Provides extended views to the outdoors
• Installation is beautifully integrated into the roof
• Allows more daylight into the room and makes it feel more spacious
• Comes ready for easy installation of VELUX sun protection products
• Can be combined with VELUX roller shutters for added heat protection

VELUX VIU - fixed vertical window element

• Fixed vertical element (does not open)
• It is an extension of the window above, providing more daylight and extended view to the outside
• Material: maintenance-free, long-lasting polyurethane surface

VELUX VFE - vertical window element 

• Inwards tilting sash to let in more fresh air
• It is an extension of the window above, providing more daylight and extended view to the outside
• Material: available in lacquered or white-painted pine wood.

VELUX VFA/VFB - tilt and turn, left or right hinged

• Available in two models: left-opening (VFA) and right-opening (VFB)
• Inwards tilting sash to let in more fresh air
• Integrated opening restrictor in order to prevent accidents with unattended children.
• Fulfils the legal requirements to be used as an emergency exit. 
• It is an extension of the window above, providing more daylight and extended view to the outside.