JUAL

Ventilation cowl for flat roof 0°

The ventilation cowl is used when the roof surface is penetrated by exhaust pipes, ventilation pipes or soil vent pipes. The cowl is fixed to the roof and provides a neat, architecturally uniform appearance. The bitumen is welded to the cowl’s flange.

Tight and functional solution for penetrations in bitumen roofs

When working with flat roofs, there are particularly high demands on tightness, functionality and aesthetics for any type of roof penetration. Especially when installing ventilation pipes, exhausts and soil vent pipes, it is crucial to have a solution that effectively prevents water ingress while harmonising with the overall appearance of the roof.

At JUAL we offer a ventilation cowl for flat roofs (0°) that meets precisely these requirements – a solution that combines superior tightness with elegant design and long durability.

The ventilation cowl is available in black-coated aluminium, stainless steel, zinc or Plastigen (ASA/PVC).

Why choose a ventilation cowl for 0° roof slope?

Flat roofs require special attention when it comes to rainwater drainage and protection against moisture. Since water does not naturally run off as it does on pitched roofs, penetrations can become potential weak points if not executed correctly. A ventilation cowl with 0° slope has been developed specifically for this purpose – it ensures a completely flush integration into the roof surface, preventing both water accumulation and leaks.

At JUAL, our cowl is designed to be mounted directly onto the roof surface and is equipped with a flange that allows the bitumen to be welded directly to the cowl. This provides a 100% tight and maintenance-free solution that lasts for decades.

Sleek and uniform appearance

In addition to its technical function, our ventilation cowl is also designed with a strong focus on aesthetics and architectural uniformity. The discreet design and the option to adapt material and colour make it possible to integrate the cowl beautifully into both modern and traditional buildings. The result is a solution that not only protects the roof structure but also enhances the overall visual appearance.

The cowl is manufactured from durable and weather-resistant materials such as aluminium, zinc or steel, depending on requirements and customer preferences. It is designed to withstand extreme weather conditions, including rain, snow, UV radiation and temperature fluctuations – making it suitable for the Danish climate all year round.

Function and application

The ventilation cowl for flat roofs is typically used in connection with:

  • Mechanical ventilation
  • Cooker hood exhaust
  • Soil vent pipe ventilation
  • Passive ventilation in roof spaces
  • Technical ventilation in industrial or residential buildings

Technical guidance and customised solutions

At JUAL, our technical team is ready to assist with guidance, dimensioning and adaptation. Do you need a ventilation cowl in a specific size, height or with a special connection? We can manufacture it to custom measurements at our own factory.

We also provide installation guides and product documentation, ensuring you a safe and professional solution from start to finish.