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Velux Glass Conversion Kit

Velux Glass Conversion Kit
15 % off

A Velux glass conversion kit is required if an existing glass unit with a thickness of 16 mm is exchanged for a unit having a thickness of 24 mm.

When ordering 24mm Glass (upgrading from 16mm) then this conversion kit is included in the cost.

Installation instructions

more options ▼ 1Window Type need help?

  • ggl Pine Finish Centre-pivot
  • ghl
  • vfe

more options ▼ 2Window Size need help?

  • 1 1 (mfd before May 92 ) £74.47 £87.61
  • 2 2 (mfd before May 92 ) £74.79 £87.98
  • 3 3 (mfd before May 92 ) £86.30 £101.53
  • 4 4 (mfd before May 92 ) £75.11 £88.37
  • 5 5 (mfd before May 92 ) £82.62 £97.20
  • 6 6 (mfd before May 92 ) £78.54 £92.40
  • 7 7 (mfd before May 92 ) £75.44 £88.75
  • 8 8 (mfd before May 92 ) £75.44 £88.75
  • 9 9 (mfd before May 92 ) £77.52 £91.20
  • 102 102 (mfd May 92 - Apr 01) £34.68 £40.80
  • 104 104 (mfd May 92 - Apr 01) £41.82 £49.20
  • 206 206 (mfd May 92 - Apr 01) £46.92 £55.20
  • 304 304 (mfd May 92 - Apr 01) £56.10 £66.00
  • 306 306 (mfd May 92 - Apr 01) £62.22 £73.20
  • 308 308 (mfd May 92 - Apr 01) £70.38 £82.80
  • 606 606 (mfd May 92 - Apr 01) £90.78 £106.80
  • 804 804 (mfd May 92 - Apr 01) £97.92 £115.20
  • 808 808 (mfd May 92 - Apr 01) £97.92 £115.20
  • 1 1 (mfd before May 92 ) £69.37 £81.61
  • 2 2 (mfd before May 92 ) £70.64 £83.10
  • 4 4 (mfd before May 92 ) £70.64 £83.10
  • 5 5 (mfd before May 92 ) £82.62 £97.20
  • 6 6 (mfd before May 92 ) £78.54 £92.40
  • 7 7 (mfd before May 92 ) £70.95 £83.47
  • 8 8 (mfd before May 92 ) £76.08 £89.51
  • 104 104 (mfd May 92 - Apr 01) £41.82 £49.20
  • 206 206 (mfd May 92 - Apr 01) £46.92 £55.20
  • 304 304 (mfd May 92 - Apr 01) £56.10 £66.00
  • 308 308 (mfd May 92 - Apr 01) £70.38 £82.80
  • 606 606 (mfd May 92 - Apr 01) £90.78 £106.80
  • 804 804 (mfd May 92 - Apr 01) £46.92 £55.20
  • 808 808 (mfd May 92 - Apr 01) £97.92 £115.20
  • 331 331 (mfd May 92 - Apr 01) £50.49 £59.40

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Help & Useful Information

How do I find which Window Type I have?

VELUX Type Signs (Data plate) explained

Every VELUX roof window carries a unique Type Sign that details the type and size of the window. In most cases the Type Sign is located at the top right-hand of the sash, behind the control bar.

Type Signs differ in appearance depending on the model of your VELUX window. Please identify and select the version of Type Sign on your window from the illustrations below:


Step 1 - Locating the type sign.

In most cases the Type Sign is located at the top right-hand of the sash, behind the control bar.

Locating the Velux Type Sign


Step 2 - Finding the codes.

Depending on the year your window was produced you'll find one of the type signs listed below.


Roof Windows delivered after 01 April 2001 can be recognised by a grey coloured type sign with the type being three letters (e.g. GGL) and a size code made up of one letter combined with two numbers (e.g. GGL-M08)
Find code in pre 1991 windows

Roof Windows delivered from 01 April 1991 to 01 April 2001 can be recognised by a golden type sign with the type being three letters (e.g. GGL) and a size code made up of three numbers (e.g. GGL 308)

Roof Windows delivered before 01 April 1991 can be recognised by a silver sign with the type being three letters (e.g. GHL) and size code made up of a numbers 1 - 14 (e.g. GHL 2)
Velux Glass Conversion Kit