Single ply roofing membranes are one of the most widely specified waterproofing solutions for flat roofs, offering a lightweight and versatile roofing system for both new build and refurbishment projects. Sika provides a comprehensive range of single ply roofing membranes for commercial, industrial, residential and public buildings. Our Sarnafil® and Sikaplan® membrane systems are suitable for exposed roofs, green roofs, solar roofs, ballasted roofs and inverted roof constructions. Sika offers two single ply roofing membrane technologies: polyvinyl chloride (PVC) membranes and flexible polyolefin (FPO) membranes. These systems deliver durable waterproofing performance, resistance to UV exposure and weathering, and can be specified for a wide variety of roof designs and structures.
Sika Single Ply Membrane Technologies
PVC Roofing Membranes
PVC (polyvinyl chloride) roofing membranes are a proven waterproofing technology with a long track record in flat roofing applications. Sikaplan® PVC membranes are suitable for exposed and ballasted roofing applications and offer flexibility, ease of installation and design versatility.
Sika-Trocal® S single ply PVC membranes have been transitioned to the Sikaplan® G range. Sikaplan® G provides additional design and specification options while continuing to deliver the durability, performance and service expected from Sika's single ply roofing systems.
FPO Roofing Membranes
FPO (flexible polyolefin) roofing membranes offer excellent durability. Their formulation allows direct application over certain substrates, such as old bitumen and EPS and XPS insulation, making them suitable for a variety of new build and refurbishment projects.
Sarnafil® AT Advanced Technology Membranes
Sarnafil® AT is Sika's advanced hybrid roofing membrane technology, combining flexible polyolefin (FPO) and elastomer properties in a single waterproofing membrane. Developed for mechanically fixed and ballasted roofing systems, Sarnafil® AT provides a durable, hot-air weldable solution suitable for a wide range of flat roof applications. By combining the characteristics of different membrane technologies, Sarnafil® AT has been developed to provide flexibility, durability and ease of installation.
Single Ply Roof Membranes & Accessories
Application Methods for Single Ply Membranes
Mechanically Fixed Roofing Systems
A mechanically fixed roofing system secures the roof membrane to the building’s roof deck using screws and fasteners, providing a strong and reliable waterproof roofing solution. Mechanically fixed Sarnafil® and Sikaplan® roofing systems are commonly specified for large commercial and industrial buildings, including warehouses, logistics facilities, distribution centres and retail developments.
Benefits include:
- Cost-effective roofing solution for exposed roofs
- Fast installation
- High wind uplift resistance
- Suitable for large roof areas
- Installation can proceed in a wide range of weather conditions
Adhered Roofing Systems
An adhered roof system uses adhesive to bond the roofing membrane directly to the insulation or roof substrate, creating a smooth and secure waterproof finish. Adhered Sarnafil® and Sikaplan® roofing systems are frequently used on public, residential and commercial buildings, as well as roof refurbishment projects.
Benefits include:
- Suitable for complex roof designs and detailing
- No penetration of the roof deck required
- Low noise installation
- High aesthetic appearance
- Suitable for refurbishment over existing bituminous roofs
Ballasted Roofing Systems
A ballasted roof system uses the weight of materials such as gravel or paving slabs to hold the roofing membrane securely in place without mechanically fixing or fully adhering it. Ballasted Sarnafil® and Sikaplan® roofing systems are commonly specified for commercial, industrial and public buildings where the roof design allows for a ballast layer, such as gravel, vegetation or paving slabs.
Benefits include:
- No mechanical fixing through the roof membrane
- Provides protection to the waterproofing membrane
- Suitable for a range of roof designs and applications
- Can accommodate roof terraces, paving and green roof systems
FAQ
Single ply membranes are flexible sheets made from synthetic materials such as PVC or TPO. They are used to waterproof flat or low-slope roofs and are known for their durability, ease of installation and long life expectancy.
Sika’s Sarnafil® and Sikaplan® membranes offer excellent weather resistance, mechanical strength and a proven track record. They are aesthetically pleasing, quick to install and suitable for both new build and refurbishment projects.
Yes. Sika offers specific membrane systems designed for use in green roof and solar roof systems, supporting sustainable and energy efficient construction.
Sika membranes can be adhered using an adhesive to hold the membrane down; mechanically fastened using screws and washers; and ballasted using the weight of ballast, paving slabs or roof gardening.
Installation methods depend on the roof structure, building requirements and design preferences.
With proper installation and maintenance, Sika’s single ply roofing systems are certified to provide watertight protection for 25+ years for FPO membranes and 40+ years for PVC membranes, backed by proven global performance and expert technical support.
