A guide to stronger thermoplastic welds

By Jesse Sanchez. 

This new technical guide gives roofing pros a clearer path to stronger seams and longer roof lifespans by breaking down the science behind welding thermoplastic membranes in the field. 

Leister is spotlighting a critical part of roofing work with a new technical guide that explains how precise welding choices can strengthen the lifespan of flat roofs. Anyone using thermoplastic membranes already knows that good welding makes the difference between a reliable seal and an early failure, but real job site conditions often make that work harder than it looks. 

The guide focuses on what professionals need most, offering practical direction that can be put to use on the roof right away. It explains the essentials of welding PVC, TPO and other thermoplastic membranes, then expands on how to set the right parameters and judge results through clear visual checks. It also covers the importance of seam preparation as a foundation for a strong weld. 

A key section of the guidebook breaks down common mistakes that can weaken weld quality, showing readers how to steer clear of issues caused by high temperatures, poor travel speed or inadequate cleaning. It also provides detailed steps for dealing with the oxidation layer that can appear on TPO membranes, along with methods to remove it, so the welds stay secure. 

Beyond troubleshooting, the guide is built for contractors, roofers and technical specialists who manage membranes like PVC, TPO, FPO, EPDM, EVA, ECB or PIB. It includes reference values for initial welding parameters in Europe and the United States, guidance on inspecting seam tightness and recommendations for preventing blistering in TPO materials. Readers will also find instructions for setting temperature, airflow and speed, along with straightforward maintenance tips to keep welding equipment ready for demanding field conditions. 

The publication presents itself as a practical tool built for real jobsite demands rather than a theoretical explainer. It emphasizes that readers will find direct guidance, step-by-step instructions and useful insights that help them strengthen their welding results with confidence. 

Learn more about how the guide can strengthen your roofing work by accessing the full resource today!