HessianCole specialise in VELUX windows, we are VELUX certified installers based in Bicester, Oxfordshire and we replace the glazing in VELUX windows throughout Oxfordshire and surrounding counties.  

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Replace your VELUX glazing

Misted glazing in your VELUX window not only looks unsightly but its costing you money too.  The seal between the 2 layers of glass has failed, releasing the gas and allowing moisture to enter and cloud your view.  The double glazed unit is now far less effective at insulating your living space, increasing your heating bills and often causing condensation issues on the window frames.

HessianCole have extensive experience replacing glazing to VELUX windows in and around Oxfordshire.  Trained by VELUX and also members of the Certified Installer scheme we are here to help with VELUX glass/glazing replacement.  Depending on the age of your VELUX window you have the option to either replace or upgrade the glazing.

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For most windows less than 10 years old VELUX still produce replacement panes to the same dimensions as your existing window.  The kit supplied with the replacement panes allows us to re install the glazing correctly and sufficiently water tight.

All replacement pane installations include a free service of the VELUX window including re greasing mechanisms and replacing filters.


​If your existing VELUX window glazing needs replacement and your window is over 10 years old it will likely require an upgrade.  VELUX supply conversion kits to allow installation of the latest glazing as supplied in the new generation windows.  HessianCole are adept in the fitting of VELUX glazing conversion kits and replacement glazing throughout  Oxfordshire and surrounding counties.

How to find your VELUX product code

In most VELUX windows from the late 1960s to present day the product code can be found on the top edge of the window sash. You will need to open the window to view the product code.

If you cannot open your window or find the data plate then provide us with the size of the window frame internally.  All pitched roof windows will have a code starting with GGL, GPL, GGU etc followed by one to three numbers. The combination of these letters and numbers make up most of the details. Any remaining numbers are related to the glazing and batch numbers.  

As you are replacing the window the existing glazing code is usually irrelevant.

Velux Data Stamp Location
Velux Data Stamps