Storminator™: a practical way to cut toxic roof runoff

Stormwater runoff is the biggest source of pollution in urban waterways, and metal roofs are a major contributor. Each time it rains, dissolved heavy metals such as zinc and copper can wash off roofs and into drains, streams and rivers, where they threaten aquatic life.

 

Research highlighted by the New Zealand Herald and Stuff notes that galvanised metal roofs are widespread across New Zealand, and that roof runoff is a major source of zinc in urban stormwater.

 

That is where Storminator™ comes in. Developed from University of Canterbury research, Storminator™ is an in-line downpipe treatment system designed to remove eco-toxic metals from roof runoff before they leave a property.

 

Storminator™ systems remove over 90% of zinc from zinc-based roofs and over 80% of copper from copper-based roofs (and spouting), giving building owners a practical way to reduce their environmental impact while preparing for tighter runoff water quality requirements.

 

What makes the technology especially appealing for the building sector is its practicality and accessibility.

 

Storminator™ systems can be installed on new buildings or retrofitted to existing ones without disrupting business as usual, meaning owners do not need to replace functioning roofs to improve stormwater outcomes.

 

The treatment media also uses New Zealand waste mussel shells, turning a seafood by-product into a low-footprint filtration solution that supports circular economy principles.

 

The technology has grown from local research into a Christchurch-based commercial venture with national and international patents, industry awards, and field trials supported by Environment Canterbury and the Christchurch City Council.

 

Its wider mission is simple: reduce the ecotoxic substances entering waterways and provide an effective, sustainable treatment option for metal-roof runoff.

 

For builders, developers and property owners, Storminator™ offers a straightforward message: cleaner stormwater runoff, easier compliance, and a smarter way to protect urban waterways from the hidden pollution coming off our roofs.