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VELUX GGL SD5J2 Conservation Window for 90mm Tiles

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£543.59 Incl. VAT
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This VELUX GGL SD5J2 is a centre pivot window with a white painted interior that is designed for fitting in conservation buildings. The external profiles and glazing bar are in RAL 9005 (black) to fit in with surrounding aesthetics and guidance on conservation buildings.

This double-glazed window comes with a glazing bar, BDX insulation collar, BFX underfelt collar and an EDJ recessed flashing kit for tiles up to 90mm thick.

VELUX centre pivot conservation window new generation features

  • More daylight thanks to up to 18% larger pane area
  • Slim profiles and larger pane means more glass and less frame
  • Innovative use of high-performance insulation material
  • More modern and attractive design with excellent ventilation and operation control
  • New design of the control bar with functionality icons
  • Improved exterior finish with a softer and more discrete expression
  • Fewer screws with the new click-on covers
  • Slimmer top cover

White painted finish and laminated glazing

The natural pine make-up of this conservation window is lacquered and then painted white on the inside to keep a modern and clean finish inside the property, regardless of the RAL 9005 colouring of the outside of the conservation window.

  • Pine core painted white
  • Excellent value for money and easy to install
  • Made from high quality natural pine
  • Protective triple coat clear lacquer helps to preserve the timber of the window

The laminated glazing in this conservation window is 6.4mm laminated inner pane with a 4mm toughened outer pane. The low-E outer pane coating combined with the thick inner pane means improved noise reduction.

Manufactured for roofs with 90mm thick tiles

The recessed flashing that comes with this window provide a sleek and streamlined finish as the window sits flush in the roofline, instead of protruding. This double-glazed window comes with a glazing bar, BDX insulation collar, BFX underfelt collar and an EDJ recessed flashing kit for tiles up to 90mm thick.

  • 10-year guarantee on windows and flashings
  • Suitable for roof pitches between 20 and 90°
  • BBA certified


Size CK06 - 55 x 118cm
FK06 - 66 x 118cm
MK06 - 78 x 118cm
MK08 - 78 x 140cm
UK04 - 134 x 98cm
Width 550mm


Code GGL Height 980mm
Finish White Painted Operation Manual
Glazing Double Glazing


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4.5 / 5 2 reviews
Steven Murr
Reviewing VELUX GGL MK06 SD5J2 Conservation Window for 90mm Tiles - 78cm x 118cm
23rd January 2021
Quality product. Mine was a conservation light with recessed flashing and the central conservation bar. Aesthetically, a very good looking product. Solid quality product with exceptional glazing standard. Very pleased and worth every penny.
Dee Edwards
Reviewing VELUX GGL MK08 SD5J2 Conservation Window for 90mm Tiles - 78cm x 140cm
31st August 2020
They arrived from Roofing Superstore very quickly, excellent service! Because the weather has changed we're now waiting for drier weather for them to be installed. Conservation Style were specified by the Conservation Officer - personally I find them ugly, but there's no choice in these circumastances, ugly is better than nothing & it's not Velux's fault. Slight panic that they wouldn't go up through the loft hatch - they are being installed before the main loft conversion starts.
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