What size are Velux windows?
Table of Contents
- What size are Velux windows?
- How do I know what size VELUX I need?
- Do you need planning permission for a VELUX window?
- How long does it take to fit a VELUX window?
- How much does it cost to have a Velux window installed?
- How old are my Velux windows?
- Can I fit a Velux window myself?
- How much does it cost to supply and fit a Velux window?
- Can I fit a VELUX window myself?
- How hard is it to fit a VELUX window?
- How big does a VELUX window need to be?
- What's the serial number on a VELUX window?
- Can you change the variant of a VELUX window?
- Which is the new VELUX window code mk08?

What size are Velux windows?
VELUX window sizes chart
Height | Width | |
---|---|---|
70cm | VELUX CK01 | |
78cm | VELUX CK02 | |
98cm | VELUX CK04 | VELUX MK04 |
118cm | VELUX CK06 | VELUX MK06 |
How do I know what size VELUX I need?
For any replacement Velux windows, there's a simple way of determining the required size. Located on the top right corner of the frame on your existing window is a plate. This plate denotes the type, size, variant, and production code of your roof window, which you can use to order an exact replacement.
Do you need planning permission for a VELUX window?
What Are The Rules for Installing A VELUX Window in the UK? The good news is that you will generally not require planning permission to install a VELUX window in a loft conversion. ... You can install replacement VELUX windows without having to worry at all.
How long does it take to fit a VELUX window?
between one and two days Installation of a Velux window can take between one and two days depending on how much work needs to be completed.
How much does it cost to have a Velux window installed?
Installing Velux Windows Typically, a window of this size would be ideal for a bathroom area. The cost of installation, complete with flashing kit, collar, insulation, roof alterations and waste disposal is likely to be between £800 and £1,100, with prices a hundred pounds or so higher in London.
How old are my Velux windows?
If the GGL or similar is followed by 1 or 2 numbers you have a window manufactured before 1991. If the GGL or similar is followed by 3 numbers you have a window manufactured between 1991 and 2001. If the GGL or similar is followed by 1 letter and 2 numbers you have a window manufactured between 2001 and 2014.
Can I fit a Velux window myself?
They can be fitted entirely from the inside, no need to walk around on the roof or hire expensive scaffolding. They come complete with fully detailed fixing instructions, have adjustable ventilators in the frame and easy to operate handles which allow for ventilation in the latched position.
How much does it cost to supply and fit a Velux window?
Prices can range from £655 for a small window, including labour costs for 6-8 hours work. For the larger balcony option, prices can increase to £3470 for 1-2 days' work – if the contractor needs third party scaffolding, expect to pay a further £500.
Can I fit a VELUX window myself?
They can be fitted entirely from the inside, no need to walk around on the roof or hire expensive scaffolding. They come complete with fully detailed fixing instructions, have adjustable ventilators in the frame and easy to operate handles which allow for ventilation in the latched position.
How hard is it to fit a VELUX window?
However, with all this being said, fitting a VELUX window, or any pitched roof window for that matter, is not as difficult as most imagine as the whole job can be completed from inside the home and you could save yourself a tidy sum.
How big does a VELUX window need to be?
In most cases, the size given represents the measurement of the external frame and not the glazed area. This should roughly be the size of hole you’ll need in your roof deck, although this can vary when using a flashing kit or insulation collar. Below is a chart showing the corresponding code for each size of VELUX window.
What's the serial number on a VELUX window?
Here are the old VELUX sizes, serial number and number codes - Window size 55 (W) x 78 (H) code 102 or CO2 or CKO2 Window size 55 (W) x 98 (H) code 104 or 6 or CO4 or CKO4
Can you change the variant of a VELUX window?
You can change the variant though as this refers to things like glazing, window finish, or opening type. So, for example, you could replace your GGL MK08 2070 VELUX window with a GGL MK08 3070 and this would replace a centre pivot white painted standard glazed window with a centre pivot pine finish standard glazed window.
Which is the new VELUX window code mk08?
If you are looking to replace an existing VELUX roof window, then you can easily use the size guide above to see which new generation code relates to your old roof window code (compare with the diagram below.) To explain, if your current VELUX branded window has a code of GGL2, then your new VELUX windows would now have the code MK08.