Ventilation cowl, costumised - round

We offer the production of custom-sized cowls at our own factory.
When ordering, you can specify the material, for example pre-patinated zinc, aluminium in any colour, copper or steel.
As standard, the cowls are supplied with a fixed slope corresponding to the correct roof pitch.
It is also possible to produce cowls with an aluminium flange for installation on pitched roofs with bitumen roofing, as well as solutions for flat roofs.

Material

• As standard, the flashing is supplied with black Fast Flash as the flashing material. Fast Flash is a plastic, lead-free material with a fully adhesive backing. It can also be ordered in other types and colours.

• Formable material factory-mounted to ensure tightness against the roof surface.

• Fixed slope matching the roof pitch.

Download order form HERE

Flexible and tight solution for roof penetrations

When a standard solution is not sufficient and the project requires precision in both function and aesthetics, a custom-sized ventilation cowl is the optimal choice. At JUAL, we offer the production of round custom-sized ventilation cowls, manufactured at our own factory in Denmark. This enables us to deliver flexible, tailor-made solutions – quickly and with high quality.

A round custom-made ventilation cowl from JUAL is ideal for ventilation exhausts, soil vent pipe ventilation and technical installations where tightness, functionality and design must come together in perfect balance.

Fixed slope – precisely matched to the roof pitch

As a standard, all round custom-made cowls are produced with a fixed slope that exactly matches the desired roof pitch. This ensures that the cowl aligns perfectly with the roof surface, thereby not only improving drainage but also creating a harmonious visual result.

We also offer the production of cowls with an aluminium flange, enabling the bitumen to be welded directly onto the cowl. This creates a watertight and maintenance-free roof penetration. This is particularly relevant for pitched roofs with bitumen or flat roofs, where correct flashing is crucial for tightness and durability.

Durable materials and easy installation

JUAL’s round ventilation cowls are designed to withstand the Scandinavian climate. Whether you choose zinc, aluminium, copper or steel, you can expect a solution with high resistance to wind, weather, UV radiation and frost.

The cowls are easy to install, and the precise manufacturing ensures simple adaptation to both ventilation pipes and roofing. We can also adjust the cowl’s diameter and height so that it fits perfectly with your pipe installations and the building’s architecture.

Applications

Our round custom-made cowls are used in a wide range of building types and projects, including:

Villas and terraced houses
Commercial buildings and offices
Industrial buildings and warehouses
Institutional buildings and housing associations

They are particularly suitable in situations where a technically secure solution is required while also meeting high demands for architectural integration and finish.