Flat skylights are a good solution for smaller constructions in which the width of the hole is too small for the minimum curve radius of a polycarbonate vault. It is necessary to caulk the flat skylight right because of the possibility of water and snow retention on its construction. Small flat skylights, as well as vast skylight glazing can be installed even on steep roofs.
The most common use of flat skylights is to create a roof hatch which illuminates the room, hall or staircase. Such roof hatches can be opened manually or be automatically operated. Operable skylights can also be used for room ventilation and can be automatically controlled according to weather conditions.
Flat skylights are one of the cheapest solutions thanks to their simple construction design which requires fewer materials.