4 top tips for finding out what size Velux window I need

15th Apr 2019
Velux extension

An attractive and practical solution for the home, Velux roof windows are a great solution for making home environments more comfortable. As a certified installer of Velux windows, we are regularly asked ‘what size Velux window do I need?’

So, to make finding your ideal size a bit easier, we’ve shared our top tips below and split them into four simple sections:

1.  Which type of room will your Velux window be installed in?White Velux windows open

A kitchen, lounge or bedroom? Our first tip for working out your required window size is to think about which room you would like a roof window fitted.

Kitchens and bathrooms, for example, are more prone to condensation build-up, due to activities such as cooking and showering. Therefore, a larger roof window will ensure these rooms have better ventilation and in turn less condensation.

In terms of bathrooms, they tend to be occupied less than most other rooms. Dining rooms or living rooms are more likely to be used, so optimising comfort levels in those areas of the house may be more important than the bathroom.

Sheerwater Glass – leading Velux window installers

As a leading and highly experienced Velux window installer, we will look into the best window solution for your individual requirements and what would suit the function of your chosen room.

Whether that be one large Velux window or several smaller windows installed together, you can be sure to get the perfect Velux window installation with us.

2. What is the shape and size of the room?

Velux windows are a fantastic way to introduce light and air to rooms. However, the size and shape of the room will have an impact on how much light and ventilation is required in order for a comfortable living environment to be achieved.

Bigger roof lights offer more light and air than smaller ones. However, you might find that more than one roof light is required to achieve optimum comfort levels.

The shape of the room will also impact the position of the roof lights and the number of them that are required. This is because of certain areas that may not be as easily accessible for the light shining through.

3. How much natural light do you want to let in?

Triple velux window installationRooms that are south-facing are likely to receive sunlight consistently. North-facing rooms, on the other hand, will be lit more dimly throughout the day. East and west-facing rooms will receive either morning or afternoon sunshine respectively.

Therefore, knowing how much light the room receives is a good way to determine how big your Velux window needs to be in order to maximise the light intake.

For rooms with an overall size of 25m², roughly five metres of the window will be needed in order to maximise the influx of light. However, there is no reason why you can’t have more if that is what you desire.

If you plan on sleeping in some days, just make sure you don’t forget about ordering blinds too!

4. How can you make the most of the outside views with a Velux window?

If you’re not particularly fond of the view outside, you might want to consider a smaller roof light. On the contrary, if you do absolutely adore your outside space, big Velux windows will allow you to appreciate that space better, as will wide Velux windows.

We can advise on the ideal Velux window size and shape to retain your privacy if your home is overlooked by neighbouring properties. This means that you will get the best of both worlds, with a bright and airy feel that still stops other property owners from looking in.

How do I find the right size for replacement Velux windows?

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. With this information, you will be able to order an exact replacement.

Bear in mind that you can also change the type of roof window while keeping it the same size.

Choose a certified Velux window installer to get exact size requirementsWhite velux window

If you’re looking for a Velux window installer, ensure that you choose a certified company to eliminate any issues from arising. There are rigorous processes to go through to become qualified Velux window installers. This ensures that installations are completed to the highest quality, so you can be sure that you are choosing an experienced and expert installer.

At Sheerwater Glass, we are a certified Velux installer so you can trust our expert advice on all things Velux windows. Our thoroughly trained team are more than equipped to get the exact requirements for a new or replacement Velux window. Our certification also means that we can perform full Velux window replacements and rectify any problems with existing roof lights.

Velux window sizes – what size roof windows can you get?

Velux windows come in a range of types and sizes. They can be made to fit slim, elongated spaces or wide, small spaces.

However, the tallest size a Velux window comes in is 180cm, with the shortest being 55cm. The widest size is 134cm and the slimmest size is 47cm. For more information about window sizes, read our blog here.

Do you need planning permission to install Velux roof windows?

Typically, there is no need to apply for planning permission when installing roof lights or skylights into your home, as long as the following requirements are met:

  • Any windows installed must not protrude more than 150 millimetres above the existing roof plane
  • No alteration can be higher than the highest part of the roof or stand out above the roof ridge
  • Side-facing windows are to consist of obscure glazing for privacy purposes and should not be openable unless 1.7m above the floor

The new Velux ACTIVE System is on display at our showroom

Here at Sheerwater Glass, we have recently introduced the Velux ACTIVE system to our showroom. Using cutting-edge technology, the ACTIVE system measures indoor and outdoor humidity, CO2 levels and temperature. It then operates Velux blinds, windows and shutters to optimise your indoor environment. You can choose from a variety of Velux window designs, colours, sizes and configurations to suit any style of property and room.

Add a bespoke touch to your home with a new roof window

Head on down to our showroom and check out this incredible innovation today. For further information on our products & services, give us a call on 01932 344 415 or fill out our simple quote form for your free no-obligation Velux window price.