Bitumen membrane sheet

Use the bitumen membrane sheetwhen installing outlets and penetrations on felt roofs. Choose between SBS and APP felt roofing with a prefabricated hole adapted to the most commonly used outlet sizes. Ensures easy, tight, and durable installation – ideal for both new builds and renovations.

Why use a bitumen membrane sheet?

When installing outlets or other penetrations on roofs covered with bitumen membrane, it is crucial to ensure a completely watertight installation. For this reason, it is recommended to place a loose sheet of bitumen membrane under the flange before the product is fixed to the roof structure.

This extra layer acts as a barrier and protects the structure against water ingress. It also reduces the risk of stress and leakage around the fixing point, thereby improving both the service life and the functionality of the roof and the outlet.

Adapted to different types of bitumen membrane – SBS and APP

At JUAL, we have developed our bitumen membrane sheets to meet different needs and roof types. That is why we offer variants in both SBS (Styrene-Butadiene-Styrene) and APP (Atactic Polypropylene) based membranes.

SBS membranes are elastic, flexible, and well-suited for cold climates, as they retain their suppleness even at low temperatures.
APP membranes provide excellent UV and heat resistance, making them ideal for areas with high temperatures or strong sun exposure.

No matter which type of bitumen membrane your roof is covered with, we provide the right solution to ensure a secure, compatible, and durable installation.

Simple and efficient installation

The installation of the bitumen membrane sheet is both simple and effective. The loose sheet is placed directly under the flange of the outlet or the relevant product. The product is then fixed to the roof structure. The loose bitumen layer creates a reinforced seal, making the installation more resistant to weather exposure and mechanical stress.

The straightforward installation makes the product suitable for professional roofers who want to ensure a high-quality result, as well as for projects with strict requirements for long-term durability and watertightness.

Sizes to fit most outlet

Our bitumen membrane sheets are supplied with prefabricated cut-outs that match the most commonly used outlet sizes:

Ø130 mm hole, suitable for outlets with dimensions from Ø50 to Ø125 mm.
Ø165 mm hole, ideal for larger outlets with dimensions from Ø145 to Ø160 mm.

These dimensions ensure a tight fit, making installation easier and minimising the risk of errors. The precise cut-outs also reduce the need for additional on-site adjustments, saving both time and resources.

Quality and functionality from JUAL

At JUAL, we place great emphasis on quality, durability, and functionality. Our bitumen membrane sheets are developed in close collaboration with industry professionals to ensure they meet the standards required for both installation and performance.

When you choose a bitumen membrane sheet from JUAL, you get a thoroughly tested solution that optimises installation and guarantees high operational reliability for many years to come.