JUAL

Vapour Barrier Roof Outlet

JUAL Vapour Barrier Roof Outlet is a vertical outlet that is installed in the vapor barrier under the insulation and whose lower part fits in a standard downpipe. In the upper part, the outlets pipe has a lip ring sleeve so that a standard roof outlet can be installed in a tight connection.

A watertight solution from Vapour Barrier to Roof Drainage

Modern construction demands high standards for both watertightness and functionality in roof structures. One of the most critical transition zones is between the vapour barrier and the drainage system—this is where JUAL’s Vapour Barrier Roof Outlet plays a key role.

The product is designed to create a tight and secure connection between the vapour barrier and the vertical roof drain that channels rainwater away from the roof surface. It is especially suitable for flat roof constructions with thick insulation, where installation through multiple layers requires precision and reliable sealing.

Application and function

The Vapour Barrier Roof Outlet is installed vertically, directly into the vapour barrier beneath the insulation layer, acting as a link between the roof’s airtight layer and the rest of the drainage system. It is constructed with:

  • A lower section that fits standard downpipes

  • An upper socket with sealing lip, allowing a tight and flexible connection to a standard roof drain

This setup ensures that the transition between vapour barrier and drainage is 100% sealed and compensates for movement, preventing moisture penetration and damage caused by thermal expansion and contraction.

Why use a Vapour Barrier Roof Outlet?

Penetrating the vapour barrier is one of the most critical details in roof construction, as even minor leaks can have serious consequences. Without a proper solution, the risk of condensation within the insulation increases, which over time can lead to mold growth, moisture damage, and reduced energy efficiency—resulting in poor indoor climate control.

By using a dedicated vapour barrier roof outlet, you get a prefabricated, sealed, and standardized solution that ensures a simple and reliable connection to the existing downpipe system. At the same time, the risk of installation errors is minimized, and you gain better documentation and compliance—benefiting consultants, contractors, and building owners alike.

Easy and secure installation

Installing the Vapour Barrier Roof Outlet requires no special tools. The lower part is inserted into the drainage pipe, while the upper socket allows a tight connection to the roof drain using a sealing lip, which absorbs movement and maintains watertightness over time.

Installation can be carried out on-site with minimal risk and high consistency—providing clear advantages for both contractors and installers.