Windows, located on the roof, pass up to 50% more light than vertical windows.
Proper lighting rooms with natural light is determined by the surface of the window to the floor surface illuminated room. In the case of living accommodation, this ratio should be approximately 1:8 - 1:10, and in the back rooms 1:8 - 1:12.
By installing a few small windows, we get a more even distribution of daylight than during the installation of one large window.
On the distribution of daylight also affects the height of the installation window. The higher will be placed in the windows of the roof surface, the better it will be illuminated room.
Proper organization of internal slopes of windows, where the bottom slope is perpendicular to the floor and the upper - parallel, increases the amount of light penetrating into the building.