Stormwater Problem? New Technology Helps Mitigate Floods

Heavy Rain Hits Across Canada

Toronto flood of August 2018

Credit: Shlomi Amiga

Two days of rain in Toronto in August 2018 caused great damage and more than $80 million in insurance claims.  Since 2017, Ottawa, Gatineau, and Montréal have flooded three years in a row. A state of emergency was declared, and the army deployed in April 2019. In 2013, in just 48 hours, the Calgary area was deluged with 325 mm (13 inches) of rain – the city’s entire annual average – causing five deaths, displacing more than 100,000 people and costing $1.7 billion.  The implementation of green infrastructure and innovative technology can help the mitigate such flooding in the urban core.

Innovative Technology Mimics Nature

StormCap™+Detention Mitigates Floods

StormCap™+Detention is an innovative rooftop stormwater detention tool that mimics watersheds and aquifers to help mitigate urban flooding.  Detention technology allows the green roof to face second day and extra-large storms.

Key Features

  • Can manage large and repeat storms and is not dependent on weather to provide a repeat performance
  • Lessen the strain on storm sewers and decrease combined sewer overflow (CSO)
  • Stores water temporarily and limits the rate at which water flows from the roof drain; and
  • Can recharge in as little as a few hours

Construction Canada cover features image of green roof in urban coreHot Off the Press

Read “Creating Friction in Green Roofs: Reinventing the Traditional Green Roof” by Sasha Aguilera and Brad Garner, Construction Canada, October 2019. Contact Sasha to learn more about StormCap+Detention.

Clear Return on Investment (ROI)

StormCap™+Detention provides a clear ROI by reducing or eliminating cisterns and bioretention facilities and freeing up valuable space for income-generating development. It even works on a sloped roof!

Powered by Urbanscape™

Superior Components

The engineered base layers include Urbanscape™’s needled mineral hydro blanket, made solely of virgin rock fibre by Knauf Insulation. This mineral wool has no binders and therefore has superior retention of 90% of water by volume and withstands freeze/thaw cycles.

Most of StormCap™+Detention’s base layers come in rolls that are easy to transport and install. It is a fully customizable system with biodiversity options.  And, can be cut in any shape or size to create logos or icons on the roof!

Next Level Stormwater Management  is a one-stop-shop supplying vegetated roof systems customized to local requirements, with warranty and maintenance support. Offer analytical support such as ​stormwater calculations specific to location ​and building/roof type.