A roof window gives you up to three times more daylight compared to a façade window. But why is that? And how do we measure it? ☀️ More sunlight: A roof window has direct access to sunlight throughout the day, and because the sun moves across the sky during the day, roof windows receive sunlight from early morning to afternoon when the sun is low on the horizon - unlike façade windows, which can only let sunlight into your room at certain times of the day. 🌳 Less obstacles: Roof windows are less affected by obstructions compared to facade windows. With a roof window, you have a clear view of the sky, while façade windows often face obstructions such as trees and neighbouring buildings. 🎩 Higher angle of light entry: Roof windows let sunlight in at a higher angle, which means the light goes deeper into the room and can reach the room from different orientations. But how do we measure the daylight? It is measured in two metrics called “illuminance” and “luminance”, which is the amount of light received on the surface and the amount of glare reflected from a surface. These levels can be measured with a lux meter or a luminance meter, but they can also be predicted through the use of computer simulations with recognised and validated software, like the VELUX Daylight Visualizer. To determine the daylight factor, it considers: ▪️The size, distribution, location, and transmission properties of the façade and roof windows. ▪️The size and configuration of the space. ▪️ The reflective properties of the internal and external surfaces. ▪️ The degree to which external structures obscure the view of the sky. Either way, the most optimal way to gain as much daylight in the room as possible, is to combine façade windows and roof windows 👇 The images speak for themselves, right?
There are many advantages with roof windows. One not mentioned here is the balanced daylight in the room. Another is the option to ventilate this bathroom. One can make rapid ventilation and get the humidity out. Good design make our buildings healthy.
Michael Price
1mo
We don’t want to forget the “privacy” factor by adding the roof window or skylight to the master bathroom!
Håkan Rosenkvist
1mo
Värt att tänka på hela svenska folket
Very helpful!
VP Strategic Development EMEA @ Kubik
1moHello Velux social marketing team. Well done for this little video. Tells your story and product benefit perfectly. My only feedback as a Velux brand fan is lose half the copy. Just not needed. :-)