Flat roof windows and light openings in flat roofs often have to fulfil several tasks. In addition to natural lighting of the interiors, they can also be used for ventilation or smoke extraction as part of a SHEV system. Especially in larger office, commercial and industrial buildings, light openings in flat roofs can be used to achieve natural lighting if the size of the room or the furnishings do not allow for sufficient window areas in the outer walls. But there are also interesting solutions for modern residential building architecture in terms of energy and appearance.
There are numerous options for designing daylight openings in flat roofs. In addition to classic square rooflight domes, manufacturers offer many other solutions.
System sketch: Rooflight dome - bauwion
System sketch: Flat roof window - bauwion
System sketch: Glass roof - bauwion
Sun protection: Measures must be taken, especially in the case of large continuous rooflights and glass roofs, to prevent the rooms below from overheating. [...] If the light opening also serves as an NRA (natural smoke extraction system), care must be taken to ensure that the control of the shading is connected to the SHEV (smoke and heat extraction system) in the case of roller blinds or awnings that are freely stretched under the light opening, [...]
Shell opening - opening dimensions: [...] In the case of classic rooflight domes, the sizes of the individual manufacturers hardly differ. [...] However, there are differences in the assortment sizes and special shapes. The size specifications on the manufacturer's lists are always so-called nominal or order sizes and are the clear measurement on the lower edge of the upstand. To determine the required shell opening, the manufacturers provide information on permissible tolerances. In most cases, the shell dimensions correspond to the nominal size ± 1 cm. The light opening is usually about 18 cm smaller than the nominal size. At the individual manufacturers you can also find detailed tables about the individual elements, with the exact sizes for the incidence of light and ventilation area.
Image: Rooflight dome - bauwion
System diversity: Daylight systems consist of a wide range of components that can be combined with each other. Rooflight domes, for example, can be opened with different drive types and mounted on different upstands. In addition, there is a huge selection of special solutions, e.g.:
SHEV Source: bauwion
