Leadax – Revolutionary sustainable roofing and Flashing

Leadax is an Award-winning Dutch SME with a working & sustainable business model in the circular economy. Leadax uses high-tech material & production knowledge for developing and manufacturing 100% circular materials out of waste for waterproofing buildings, such as flat roofing, flashing and waterproofing basements. Leadax operates on a global scale and is ready to accelerate its impact.

The products are made of discarded PVB waste (polyvinyl butyral), a plastic foil used in laminated glass (e.g., car windows and safety glass). Leadax designed its products to be easily dismantled, recycled and used again as raw material for new products at the end of their lifecycle. With the production of waterproofing materials Leadax tries to solve a problem of 1,5 billion kg of unusable plastic waste annually, only in Europe.


“Our aim is to use today’s waste to prevent global waste forever”

Roeland van Delden, CEO Leadax

Successful upscaling

Fossil fuels are running out, so Leadax wanted to create future-proof products without compromising quality. In 2015 Leadax identified PVB waste as raw material for producing building materials. After two years of extensive research and development, their first flashing product entered the market. However, even when Leadax Flashing would replace all the toxic lead globally, 95% of the PVB waste pile would still be left each year. And that’s just in Europe alone.

For this reason, Leadax continues to develop new products. In 2021 several new products will be launched, including flat roofing. This disruptive innovation is the latest and fifth standard in roofing products, next to EPDM, PVC, TPO, and bitumen.


The company has won several awards (e.g., ING Circular Entrepreneur Award 2020 and Netherlands Innovation Award 2019), was runner-up at the Global Innovations Awards 2020, and is a sponsor of the World Expo Dubai 2020 (organised in 2021 due to Covid-19). Currently, Leadax is expanding its market and redefining the definition of ‘waste’ globally.

Leadax products are the most sustainable waterproofing solutions globally, made from recycled plastic waste!