Stratford Company Excited to Expand Green Alternative to Asphalt Across Canada

Stormflow Surfacing of Stratford is looking forward to installing its water permeable surfacing product in commercial parking lots across the country after completing a three-year pilot project with the University of Waterloo this summer.

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Green paving technology from a Stratford start-up could soon replace asphalt paving in commercial parking lots across Canada.

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Stormflow Surfacing’s replacement asphalt is made from recycled truck tires, granite and a polyurethane binder. Unlike asphalt, the porous nature of this surfacing product allows rainwater to drain to the base and subsoil rather than into municipal storm sewer systems.

According to an article published by the University of Waterloo last fall, one square foot of Stormflow coating product can absorb 5,800 gallons of water per hour, while every 1,000 square feet of product saves about 300 tires. of the landfill.

Although this product has been around for some time and is being applied more widely in the United States, Stormflow Surfacing owners and Stratford residents Tim Roth and Julie Redfern-Roth have limited themselves to applying their product to residential driveways, playgrounds, walkways and a handful of other smaller projects, including cushions under outdoor Stratford outdoor dining tables on Tom Patterson Island.

The mixture of recycled truck tires, granite and a polymer binder from Stormflow Surfacing was used to create the cushions for Stratford's Al Fresco outdoor dining tables on Tom Patterson Island.  Photo submitted
The mixture of recycled truck tires, granite and a polymer binder from Stormflow Surfacing was used to create the cushions for Stratford’s Al Fresco outdoor dining tables on Tom Patterson Island. Photo submitted

“We’ve been officially in business for five years,” Redfern-Roth said. “We had kind of played with that for a few years before that. This is the eighth year that our driveway has existed and we have a fire pit in our garden with a small driveway. Gosh, we did maybe 25 lanes (locally).

Towards the end of a three-year pilot project in the Township of Wellesley with the University of Waterloo’s Center for Pavement and Transportation Technology, the pair said researchers tested how the Stormflow product holds up to heavy traffic. motoring more intense in an environment simulating a commercial parking lot. The tests also assess how the product resists weathering, where in a car park it can be applied effectively and how well it can bond to asphalt pavement.

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If the project is successful, Redfern-Roth and Roth hope to begin marketing it to businesses and municipalities across Canada to reduce stormwater runoff from asphalt pavement.

“We changed our name from Porous Pave Ontario to Stormflow Surfacing because we really wanted to focus on stormwater issues for municipalities in particular,” Redfern-Roth said.

Roth said Stormflow’s product not only reduces the amount of runoff that enters municipal storm sewers, relieving some of the strain on the city’s infrastructure, but also helps prevent water from s accumulation in low-lying areas and reduces the amount of trash and other pollutants on the ground that are washed into nearby waterways.

“It has already been tested in the United States for its permeability… weathering, compression, a whole bunch of tests for engineers and for different projects. … So we wanted to redo all the tests to meet Canadian standards and work with a Canadian university and build our credibility. … So it’s been three years and it will end at the end of June. (After that) we will have all the final tests and we will get engineering drawings for different undercover applications or other commercial parking lots (projects),” Redfern-Roth said.

A driveway in Stratford paved with Stormflow Surfacing's environmentally friendly and more porous alternative to asphalt.  Photo submitted
A driveway in Stratford paved with Stormflow Surfacing’s environmentally friendly and more porous alternative to asphalt. Photo submitted

The couple is also looking to make the product more sustainable. As well as using recycled truck tires that would otherwise go to landfill, Roth said they are exploring a potential partnership with a masonry company in Milverton that could open up a local supply of granite left over from other projects. .

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“There are a lot of companies that use granite for construction…and they have a lot of waste,” Roth said. “So there’s a business near Milverton that… has loads and loads of it.” We’ve been talking to them and hopefully we can get recycled bits and stuff from them that will end up being ground up and used in our mix.

For now, Stormflow Surfacing is looking for installation teams so they can begin to move out of the research and development phase and market their product across Canada, an initiative recently supported by a $20,000 grant. as part of the GoodSpark grant for small businesses from Desjardins Group.

For more information on Stormflow Surfacing, visit

[email protected]

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