Parapet Outlet
Parapet Outlet drainage is a roof outlet with a horizontal flange and roof membrane. The water drains vertically from the flat roof and is discharged horizontally through the parapet via the pipe, which has a slight slope.
System Components
Drainage through the parapet
When it comes to draining flat roofs, it is crucial to choose solutions that ensure reliable performance, high watertightness, and long durability. JUAL’s Parapet Outlet is designed specifically for this purpose – a custom-developed solution that directs rainwater vertically from the roof surface and horizontally through the parapet via a slightly sloped drainpipe.
The parapet outlet combines technical functionality with high-quality materials and is particularly well-suited for buildings with flat roofs and drainage through the facade or cornice.
How does a Parapet Outlet work?
A parapet outlet collects rainwater from the flat roof and safely diverts it away from the roof structure. At JUAL, the drain is built with a horizontal flange that allows for optimal integration with the roof membrane, ensuring a tight and durable seal.
Water from the roof surface flows vertically into the drain and is then led out through a horizontally positioned pipe integrated into the parapet. The pipe has a slight slope to allow natural water flow away from the building, reducing the risk of backflow or water build-up.
This solution enables water to be directed to the exterior of the building, which often simplifies connection to rainwater systems or enables free-flow drainage into the terrain.
Ideal for modern flat roof constructions
The parapet roof outlet has been developed specifically for modern buildings, where flat roofs are often used for both aesthetic and functional reasons. In such cases, it is important that the drainage system is not only efficient but also discreetly integrated into the building’s structure.
By routing the drainage through the parapet, a compact solution is achieved that eliminates the need for vertical downpipes from the roof edge - an advantage especially appreciated in architectural designs that emphasize clean lines and concealed installations.
Tightness, reliability, and long service life
One of the major challenges in roof drainage can occur if the installation is not watertight or properly integrated into the roof membrane. JUAL’s parapet outlet is designed with a strong focus on long-lasting tightness and durability.
The horizontal flange and its connection to the roof membrane create a secure and robust seal that withstands frost, UV exposure, and thermal movement in the roof surface.
The materials are corrosion-resistant and well-suited for residential buildings, commercial properties, and industrial applications - where efficient drainage is a critical factor.
Advantages of JUAL’s Parapet Roof Outlet
Efficient Drainage from flat roofs
Vertical drain and horizontal outlet through the parapet
Horizontal flange ensures strong fastening and tight connection to the roof membrane
Concealed installation – no visible downpipes on the facade
Slight slope in the pipe ensures natural water flow
Ideal for both new builds and renovation projects
