JUAL

Soil pipe ventilation - Double pipe

The soil pipe ventilation provides a watertight flashing at the roof surface and an airtight extension of the soil pipe above the roof surface.

Watertight and airtight solution

In modern construction, properly executed roof penetrations are crucial for both functionality and the building’s lifespan. When it comes to ventilation of drainage systems, particularly high demands are placed on tightness, durability and ventilation.

With JUAL’s soil pipe flashing with double pipe, you get a professional and thoroughly tested solution that meets all technical requirements and ensures optimal operation of the soil pipe ventilation.

You are guaranteed a strong and reliable penetration that keeps the roof surface sealed and ensures the drainage system functions as it should – both in the short and long term.

What is a soil pipe flashing with double pipe?

The soil pipe flashing with double pipe is designed to create a watertight seal in the roof surface while providing an airtight extension of the soil pipe up to the roof level. The flashing consists of an integrated pipe-in-pipe construction, where the inner pipe carries the ventilation from the drainage system, while the outer pipe ensures tightness and stability in the roof structure.

This type of solution is typically used on flat roofs where high tightness and precise adaptation to the roof membrane – such as bitumen or roof foil – are required.

Why choose the double pipe solution?

The double pipe construction serves several important functions:

  • The inner part ensures correct and uninterrupted ventilation of the soil pipe, preventing negative pressure in the drainage system and minimising the risk of odours.

  • The outer part acts as a solid and tight flashing, protecting against penetrating rainwater and condensation – and allowing the roof covering to be welded securely to the flashing.

The result is a strong and reliable penetration that keeps the roof surface sealed and ensures the drainage system functions as intended – both in the short and long term.

Advantages of soil pipe flashing – double pipe

  • Watertight integration with the roof surface
  • Airtight extension of the soil pipe
  • Reduces the risk of condensation and moisture damage
  • Long service life and high resistance to weather exposure
  • Easy installation and flexible adaptation
  • Available in different materials and dimensions
  • Ideal for both new builds and renovation projects