Flat roofs have numerous advantages; however, they must often master an enormous structural challenge. Safety, fire protection and thus the issue of roof drainage are the top priorities in design and construction.
ACO offers functional solutions, which are especially coordinated for use on flat roofs and ensure optimum removal of rainwater. Gravity drainage systems are suitable for smaller areas. On large roofs with 150 m² or larger, vacuum drainage systems are preferred. ACO offers products made of cast iron and stainless steel. We also have special solutions for green roofs, copings and for emergency drainage. ACO helps you to design the correct roof drainage and to perform the hydraulic calculations with its latest, standardised design software and its extensive practical knowledge.
Gravity drainage
Flat roof gullies for gravity drainage are used for draining small flat roofs with a surface area of less than 150 m2 per gully. However, this kind of drainage can also be used for larger roofs. Whether the roof covering is a membrane, concrete or gravel, ACO Spin flat roof gullies can be flexibly adapted to suit different requirements. The individual components of the gullies such as gratings, top sections and gully bodies can be combined as needed using our building block system.
With the correct accessories, ACO Spin flat roof gullies can also be used to drain green roofs. With increasingly dense construction occurring in towns and cities, more and more ecological surfaces are being covered. With an intensive or extensive green flat roof it is a relatively simple matter to compensate for this.
Siphonic roof drainage
Traffic-free roof areas which are no larger than 150 m2, such as production buildings, hangars or sports stadiums, are suitable applications for siphonic drainage.
When the rainfall is heavy enough, the gullies create reduced pressure in the pipe system. This means that an increased level of drainage performance can be achieved compared to simple gravity drainage.
Siphonic drainage can be used on membrane, concrete and gravel roofs as well as on green roofs with extensive planting. When sizing and installing a siphonic system, there are a series of guidelines to be followed. That is why our own internal Application Technology department will be happy to carry out the calculations relating to the system for your project, including the isometric diagram of the pipe layout and creating a list of the materials required.
