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

15th Apr 2019
Velux Roof Window

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 them, we’re 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.

1. Which type of room would you like one fitted?

Our first tip for working out your required size is to think about the room where you’d like a roof window fitted. Is it a bedroom, living room, bathroom or something else? Kitchens and bathrooms, for example, are more prone to condensation build-up, due to activities like cooking and showering. Therefore, a larger roof window will ensure these rooms are better ventilated and the risk of condensation forming is reduced.

Bathrooms are also inhabited for the least amount of time overall, so you might find optimising comfort levels less important in there than you would in, say, a living or dining room.

2. Consider the shape and size of the room

Velux Window and family

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 attained. 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 light(s) and the number of them that are required.

3. How much light is required?

Rooms 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 also 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 light in there.

For rooms of an overall size of 25m², roughly 5m of window will be needed to maximise light. However, there’s no reason you can’t have more if desired. If you plan on sleeping in some days, just make sure you don’t forget about ordering blinds too.

4. Don’t forget about the outside view

Velux Window in Oak

If you’re not particularly fond of the view outside, you might consider a smaller roof light. But, on the contrary, if you absolutely adore your outside space, a larger Velux roof window will allow you to appreciate it better.

Finding 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, which you can use to order an exact replacement. Bear in mind that you can also change the type of roof window and keep it the same size.

As a certified Velux installer, we can perform full replacements and rectify any problems with existing roof lights.

The new Velux ACTIVE System on display here at Sheerwater Glass

Here at Sheerwater Glass, we’ve recently added the Velux ACTIVE system to our showroom. Using cutting-edge technology, the ACTIVE system measures indoor and outdoor humidity, CO2 levels, and temperature and then operates Velux blinds, windows and shutters to optimise your indoor environment. Head on down to our showroom and check out this incredible innovation today. Or, for further information on our products & services, give us a call on 01932 344 415 or take a look around our website.