Velux offers high-quality roof windows and accessories at affordable prices with easy installation and easy maintenance.

Velux Solar Centre Pivot Velux Manual Top Hung Velux Manual Centre Pivot Velux Low Pitch Centre Pivot Velux Electric Top Hung Velux Heritage Conservation Velux Conservation Centre & Top Hung

Velux Solar Centre Pivot GGU GGL

Let daylight power your Velux Roof Window with an integrated solar cell, opening your windows with a wireless switch and a rain sensor.

Velux Manual Top Hung GPU GPL

The Velux top-hung roof window gives a panorama view and the feeling of space with uninterrupted views.

Velux Manual Centre Pivot GGU GGL

Perfect for small rooms, staircases and bathrooms. Add daylight and fresh air to your room and get the benefits of natural daylight and ventilation with this single roof window.

Velux Low Pitch Centre Pivot GBL

Bring twice the daylight to your house with the low pitch roof window, especially made for homes with low pitches (10°-20°).

Velux Electric Top Hung GPU GPL

The Velux electric top-hung roof window gives a panorama view and the feeling of space combined with convenient electrical operation for installation within reach.

Velux Heritage Conservation GCL

The VELUX Heritage Conservation Top-Hung GCL roof window is designed to be in keeping with heritage aesthetics of historical or listed buildings.

Velux Conservation Centre & Top Hung

The VELUX Conservation roof windows offer a contemporary choice for traditional properties.

Locate Your Velux Code Plate

If you are looking to replace an existing VELUX roof window then you can find the full product code on the size plate attached to your window frame.

It will be located in the top left corner of the window frame, you will need to open your centre pivot window, or if you have a top hung window you’ll need to open it in a cleaning mode, a video of how to do that can be found here: Cleaning a Top Hung Velux Roof Window

The image above shows how a new Velux Code plate looks above a code plate for a window dated between 2001-2014. For Velux roof windows installed before 2001 take a look at this compatibility table available to viewed and download here.

Velux Compatibility Table

Understanding Velux Product Codes

The image to the left breaks down the modern Velux Product codes so you can make sure you are ordering and comparing the correct products. These appear as SKU codes on our website.

The first three letters refer to the Window Type: GGL is a Timber Framed Centre Pivot, GGU is a uPVC Centre Pivot.

The next 4 are a mix of letters and digits that refer to the size of the window. the table below shows how the letters relate to the width of the window, and the 2 digits relate to the height. MK06 in the example above is 78cm wide x 118cm tall.

After the size the next digit in the Velux Product Code relate to Interior and finishes. The three main Interior Finishes are:
0 – uPVC maintenance free frame
2 – White Painted Timber Frame
3 – Pine Frame with a clear lacqur

Exterior Finish is almost always 0 – Aluminium although special and custom finishes can be requested on a made to order basis.

After finishes comes to the glazing option. there are up to 4 to choose from depending on the model of window you are choosing, they are:

70 – 2-layer glazing with rain noise reduction, laminated safety glass, UV protection and extra toughened glass
68 – 3-layer glazing for improved energy efficiency
66 – 3-layer glazing for high energy efficiency with easy to clean and anti-dew coatings
67 – The best performing 3-layer glazing delivering optimal energy efficiency and indoor comfort

And Lastly the final 2 digits are the operation of the window, manual windows will have no digits at the end ie: GGU MK06 2070.

The operation options are:
21U – Electrically operated roof window
30 – Solar-powered roof window
40 – Smoke ventilation

Choosing the Correct Velux Window Flashing Kit

Once you have deciphered your Roof Window product code you’ll need to make sure you are ordering the correct flashing. To determine which flashing is suitable for your project you need to know a few pieces of vital information about your project.

Firstly check your roof pitch, for pitches of 15 – 55 degrees there are a wider choice of options. For pitches 10-15 degrees you will have to use the special GBL Low Pitch flashing, which can only be used with the GBL Low pitch window and is sold as a kit containing both the window and the flashing. This window is only suitable for interlocking tiles.

The flashing kit you need depends on the type of roof covering and the roof pitch.

EDW flashing – for interlocking and profiled tiles
EDL flashing – for slate roofs
EDP flashing – for plain tiles
EDU flashing – for slate roofs where a conservation window is being fitted
EDT flashing – for flat interlocking tiles (profile depth less than 40mm)
EDN flashing – for slate roofs where a recessed window is being fitted
EDJ flashing – for interlocking profile tiles where a recessed window is being fitted

Our Sales Team have a detailed knowledge of the full Velux range so if you have any questions or want clarity before placing your order don’t hesitate to ask us any questions related to roof windows and flashings. Call us on 01492 581 530 or message us here.

As a VELUX Dealer we have access to the entire VELUX range.

You can download and browse the full catalogue here: Velux Product guide 2026

Products not listed on the website can be ordered by speaking to our team, you can contact us online or call us on 01492 581 530

Who we are

Gordon H Richards has been based in the North Wales area since 1930, initially distributing slate from the Welsh slate quarries from the quay in Caernarfon, back when we dealt directly with Lord Penrhyn. Since those early days, natural roofing slate has always been a huge part of what Gordon H Richards has been about, with Welsh slate always featuring as a key component.

About us

Since those early days, natural roofing slate has always been a huge part of what Gordon H Richards has been about, with Welsh slate always featuring as a key component.

We’re proud to be the only traditional specialist roofing merchant in North Wales and have years of experience.

We can also offer technical knowledge and estimating services to assist you with your project.

Whether you’re looking for the perfect slate for a period property or modern tiles for a new build, our friendly team can advise you on the best materials and ensure your project runs smoothly.