Our story

Using today's waste to prevent global waste forever

From plastic waste to raw material

The way we produce and consume can and must change. Because our earth’s resources are being depleted and we also want our children to have a bright future. Therefore we offer roofing materials, made from plastic waste, to ensure that the waste never returns. Roofing materials with a future.

Together with our global partners, we provide building professionals with the products they need, taking into account the limits of our earth. Products that are easy to use, of high quality and affordable. But that are also circular and sustainable.

By continuing to innovate, we can continue to improve the quality and level of sustainability of our products. For people and planet.


We believe it is not only important that our products are of the highest quality, but also that we leave behind a livable planet.

High quality

Leadax is the first and only lead substitute in the world to be certified by KIWA, setting the standard.


At the end of its life, our products can be recycled and reused for new Leadax products. 

Using today’s waste to prevent global waste forever

“From a young age, I developed and sold waterproofing products from bitumen with my company Bitufa. This eventually led to a production facility that sold products all over the world. For example, the materials have been used in many notable projects such as the TOGG factory in Turkey and the Emirates Towers in Dubai.

I realized, as did others, that companies affiliated with the linear economy were depleting the earth’s resources, there was a huge plastic waste problem, and that we needed to make the move to a circular economy. To make this happen, we had to change. For this reason Leadax was founded.”

Roeland van Delden MSc., Founder Leadax

From the new lead to Roov

The genesis of our sustainable roofing materials started in 2014 when we started looking for a sustainable raw material for our lead replacement that is also recyclable at the end of its life.

We stumbled upon polyvinyl butyral (PVB), a type of plastic used in safety glass, such as car windows and building glass. This plastic film is very strong and ensures, for example, that a car window does not break into a thousand pieces when a stone hits it while driving. When this window is replaced, the plastic waste ends up in a landfill or in an incinerator. In other words, unused waste. A great pity for such a strong raw material. That’s why we decided to give PVB a different purpose.

After a years-long process of research, development and intensive testing, we launched our first lead substitute made from recycled PVB in 2017: ‘Leadax Original’. Since then, our range of lead replacements has grown rapidly and we also offer two self-adhesive lead replacements: Leadax Easy FA and Leadax Easy SA. 

But it didn’t stop there. There is so much plastic PVB waste available, that Leadax started thinking even bigger. Again after an intensive research phase, at the World Expo in Dubai we introduced probably the world’s most sustainable roofing material* from that same plastic waste: Leadax Roov.

* Based on independent research by NIBE in the Netherlands, 2022

Sustainable Development Goals

As a manufacturer of the world’s most sustainable and circular roofing materials, we want to make the world a little better. We strive for a liveable planet for everyone and everything. That is why we are committed to the Sustainable Development Goals of the United Nations. With our lead substitutes and roofing membrane, we are on a mission to change the world for the better.

Waar willen we naartoe?

We are committed to the United Nations Sustainable Development Goals and with our circular and sustainable lead
replacement products we are on a mission to change the world for the better.

As being the most sustainable roofing producer in the world, we work towards a global impact in reduction of CO2 emissions,
an increase of autonomy of fossil resources, a large reduction of waste and creating jobs worldwide in the Cleantech.

The benefits of our sustainable waterproofing products

Using today’s waste to prevent global waste forever: that is our mission. Therefore we are committed to the United Nations Sustainable Development Goals and with our circular and sustainable lead replacement products we are on a mission to change the world for the better.


Hoe sterk zijn loodvervangers? Kunnen zij verschillende weersomstandigheden aan?


Hoe circulair zijn loodvervangers?


Hoe vuurvast zijn loodvervangers?


Hoe duurzaam zijn loodvervangers? Hoe lang gaat het mee?

Our partners and certificates

More inspiration

Circular bungalow in Lunteren (NL)

A sustainable and circular bungalow is fitted with Leadax Roov, probably worlds' most sustainable flat roofing material.

The City crane in Utrecht, reborn

Leadax Original has become a permanent feature in the Utrecht streetscape in the form of a historic crane.
Tijdens de renovatie van een spouwmuur gebruikt Van Egmond Metselwerken loodvervanger van Leadax

Lead replacement used in a cavity wall

"Leadax Original attaches nicely and well to the roof surface, preventing it from bulging."

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