PVC & Bitumen Membrane Flat Roof Systems

Depending on the project, the scope can include:

PVC single-layer membrane systems include the required membrane, mechanical fixings and project-specific detailing.

Mechanically fixed PVC membranes are installed with hot-air welded seams, including detailing around parapets, upstands, penetrations, roof outlets and perimeter interfaces.

Two-layer bitumen membrane systems can be incorporated into the same complete insulated flat roof scope.

The base layer is mechanically fixed to the supporting roof build-up, followed by the second bitumen membrane layer. Parapets, penetrations, roof outlets, perimeter waterproofing and other interfaces are incorporated into the complete membrane system.

Thermal insulation can be configured to form the required falls and counter-falls, coordinated with roof outlets and the project drainage layout.

This allows the insulation geometry, drainage points and waterproofing details to be developed within one coordinated roof package.

For steel frame buildings where the scope also includes the load-bearing steel structure and trapezoidal roof sheets, the primary steel, structural roof deck and insulated roof build-up can be coordinated as one system.

The complete roofing package can extend from load-bearing trapezoidal roof sheets, where required, through insulation and drainage build-up to the finished PVC or two-layer bitumen waterproofing system.

One coordinated subcontractor scope from the supporting roof base to the finished waterproofing system.