Duro-Last introduces industry-first PVC/TPO Tie-In, delivering a purpose-built solution for membrane transitions

This innovation provides contractors with a faster, more consistent approach to completing critical tie-in conditions.

Duro-Last, a member of the Amrize family of brands and a leading manufacturer of custom-fabricated single-ply roofing systems, announced today the launch of its PVC/TPO Tie-In Strip, an innovation designed to solve one of the industry’s most persistent installation challenges: creating a reliable, watertight transition between PVC and TPO membranes.

Historically, connecting dissimilar single-ply systems has required time-intensive field fabrication and inconsistent detailing, increasing the risk of variability and long-term performance concerns. The Duro-Last PVC/TPO Tie-In Strip addresses this issue with a purpose-built, engineered solution to provide contractors with a faster, more consistent approach to completing critical tie-in conditions.

“Contractors have had to improvise when transitioning between PVC and TPO for years, and that is exactly the kind of challenge we are focused on solving,” said Darren Schulz, president of Duro-Last. “The PVC/TPO Tie-In reflects our commitment to delivering meaningful innovation that makes a real difference on the roof. By engineering solutions around how contractors actually work, we are helping simplify complex details, improve consistency and elevate long-term system performance.”

The PVC/TPO Tie-In features a 10-foot strip with an 8-inch PVC skirt and a 6-inch TPO skirt, both factory-welded to PVC/TPO-coated metal to enable secure structural fastening and membrane compatibility. Prepunched fastening patterns and clearly defined welding parameters promote consistent installation across crews, reducing variability and supporting long-term watertight performance.

The introduction of this product comes at a time when hybrid roofing conditions are becoming increasingly common. Reroofing projects, retrofits and phased building expansions often require transitions between existing and new membrane types, creating added complexity for contractors in the field. The PVC/TPO Tie-In is designed specifically to meet these evolving jobsite demands, enabling contractors to complete transitions more efficiently and with greater confidence.

This innovation has already earned industry recognition, receiving the 2026 Innovative Product Showcase & Awards distinction at the 2026 International Roofing Expo and the Expert’s Choice Award for roofing products. These honors highlight the product’s role as a contractor-focused solution that addresses real-world challenges.

The PVC/TPO Tie-In Strip reflects Duro-Last’s broader commitment to innovation through engineered solutions. The brand continues to develop products designed to streamline installation, reduce complexity and enhance performance standards across the commercial roofing industry by addressing real-world challenges contractors face every day.

For more information about the PVC/TPO Tie-In Strip, as well as Duro-Last’s vast catalog of innovative commercial roofing solutions, visit duro-last.com.

About Duro-Last

Duro-Last is a leading manufacturer of custom-fabricated thermoplastic single-ply roofing systems based in Saginaw, Michigan, with eight manufacturing locations across the U.S. Known as the “World’s Best Roof®”, Duro-Last’s factory-controlled custom-fabrication can eliminate up to 85% of field seams, resulting in lower on-site labor costs and easier installation. Duro-Last’s roofing systems are sustainable and durable. More than 2 billion square feet of Duro-Last membrane has been installed throughout North America. Duro-Last is a brand of Amrize Building Envelope LLC. For more information on Duro-Last, call 800.248.0280 or visit duro-last.com.  

About Amrize

Amrize (NYSE: AMRZ) is building North America, as the partner of choice for professional builders with advanced building solutions from foundation to rooftop. With over 1,000 sites and a highly efficient distribution network, we deliver for our customers in every U.S. state and Canadian province. Our 19,000 teammates uniquely serve every construction market from infrastructure, commercial and residential to new build, repair and refurbishment. Amrize achieved $11.8 billion in revenue in 2025 and is listed on the New York Stock Exchange and the SIX Swiss Exchange. We are ready to build your ambition. Learn more at amrize.com.