Bottom Operated Std. Pinewood roof window Centre-pivot - GZL 1051BBottom Operated Std. Pinewood roof window Centre-pivot - GZL 1051BBottom Operated Std. Pinewood roof window Centre-pivot - GZL 1051BBottom Operated Std. Pinewood roof window Centre-pivot - GZL 1051BBottom Operated Std. Pinewood roof window Centre-pivot - GZL 1051B
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Bottom Operated Std. Pinewood roof window Centre-pivot - GZL 1051B

This product is subject to regional limitations, please check availability on the "regions" tab.

The VELUX bottom-operated, centre-pivot roof window GZL1051B offers the great essential functionalities of the VELUX brand. Bottom operation makes it easy to operate the window when installed in a higher position, for example due to a high knee wall.
• Great value for money from a two-layer pane with a Uw of 1.3 W/m2K.
• Refresh your home by slightly opening the window and fixing it in the top bushing.
• Easily rotate the window 180° for safe cleaning of the outer glass from the inside.
• Adjust the bottom handle position to ventilate your home without opening the window.
• Maintenance-free exterior covers increase peace of mind throughout the lifetime of the roof window.
• Removable and cleanable ventilation filter protects your home from dust and insects while ventilating.
• Quickly and easily add blinds using the unique Pick&Click!™ system.


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      • Heat insulation 
        The low energy glazing provides reduced heat loss through the window and enhanced indoor comfort.Uw = 1.3

        Solar gain
        In the wintertime, the heat from the sun entering through the windows is a usable solar gain.g = 0.64

        Solar protection
        In warm climates and in rooms with large window areas, a sun protective coating provides a better indoor climate during summer periods.★★☆

        Sound insulation
        A combination of laminated glass and optimal glass thickness provides better sound insulation against noise from outside (traffic, playgrounds, etc).RwdB = 29(-1;-3)

        Energy balance
        The energy balance represents the ability of the roof window to utilise the passive solar gain and keep in the heat during winter. It also represents the ability to protect against the risk of overheating during summer.

        Outside strength
        Toughened outer glass makes your glazing more resistant to hail, heavy wind and snow loads.

        Glazing structure
        Glazing unit - Double-glazed
        Inner glass - 4 mm float glass
        Outer glass - 4 mm toughened glass
        Cavity - 16 mm
        Gas type - Argon

      Technical specification
      • Unique ref.GZL-1051B
      • Collection setCenter Pivot
      • CollectionManual bottom operated
      • TypeObject (single object)
      • Date of publishing2019-08-05
      • Edition number3
      • Material mainPine
      • Material secondaryGlass
      • Designed inDenmark
      • Manufactured inDenmark
      • BIMobject CategoryWindows - Roof Window
      • IFC classificationWindow
      • UNSPSC nameSkylights
      • UNSPSC code301718
      • Uniclass 2015 CodePr_30_59_98_97
      • Uniclass 2015 DescriptionWood frame roof window units
      • CSI MasterFormat 2014 Code08 61 00
      • CSI MasterFormat 2014 TitleRoof Windows
      • OmniClass TitleRoof Windows
      • OmniClass Number23-17 13 23
      • CSI UniFormat II CodeB3020
      • CSI UniFormat II TitleRoof Openings

      Region availability

      Europe South America Asia
      Czech Republic
      Bosnia and Herzegovina