The exterior surface
The first thing you need to consider is the exterior surface of your flat roof window. If you want to bring daylight into uninhabited spaces, such as garages, sheds, or smaller industrial buildings, our dome is the perfect, cost-efficient solution. The opaque dome skin provides diffused daylight, giving a good level of illumination for working without glare. It is also suitable for installations with a 0° roof pitch.
For improved insulation, energy efficiency and noise control, the flat roof windows with glazing are ideal. If you want extra insulation benefits, consider the advanced dome model with glazing, which is available in either a clear or opaque finish. And if you are looking for a state-of-the-art solution for your living spaces, consider VELUX glass rooflights.
The VELUX flat glass rooflight is designed with our award-winning glass-to-edge design, slim frame and choice of either double or triple glazing for noise control and high energy efficiency. Or select our curved glass rooflight with the added benefit of a uniquely curved-shaped glass top that makes it easy for rainwater to run off the surface, even on roofs with a 0° pitch.
The size of the rooflight
Flat roof windows can provide three times more daylight than facade windows. We recommend that the size of your roof window should be at least 10% of your room floor area. VELUX flat roof windows come in a variety of sizes.
The biggest dome is 200 x 100cm, which provides a vast diffused light influx for optimal working conditions.
The glazing of your windows
Designed for uninhabited spaces, the VELUX dome comes with a two or three-layer skin. For improved insulation, energy efficiency and noise control for outside traffic and other sounds, consider VELUX solutions with glazing, such as the dome with glazing or our best-in-class glass rooflights (both flat and curved) that are available with double or triple glazing.
We also have smoke ventilation solutions, including roof exits and burglar-proof solutions, to maximise indoor comfort and provide optimal security when choosing VELUX products.
If you have any questions about which flat roof window is best suited to your needs, please contact our Design Advisors.