SOURCE: Porous Pave, Inc.

Porous Pave, Inc.

March 25, 2015 09:35 ET

City of Grand Rapids to Complete Replacement of Tree Grates in the Downtown Area With Porous Pave Permeable Paving Material

Replacing Rusted, Broken Iron Tree Grates With Porous Pave Makes Downtown Sidewalks Safer, Streetscapes More Attractive

GRAND RAPIDS, MI--(Marketwired - Mar 25, 2015) - In its continuing effort to make its downtown more welcoming, and to support its sustainability initiatives, Grand Rapids is completing the replacement of 750 old iron tree grates with Porous Pave XL. Manufactured by Porous Pave, Inc., Porous Pave is a highly porous, durable and flexible pour-in-place surfacing material that is a proven solution for green stormwater infrastructure. An eco-friendly green building product, it consists of recycled rubber, stone aggregate and a binder.

The first phase of the project was completed in September 2014 before the annual ArtPrize event. The city had Porous Pave tree surrounds installed to replace 250 cracked and broken grates that presented the most serious tripping hazard in the three square miles of downtown. An additional 500 grates will be replaced by July 2015.

"Porous Pave allows rainwater and air to get down to the tree roots," said Mark DeClercq, P.E., city engineer. "With its high rubber content and textured surface, Porous Pave is slip resistant and safer when wet than traditional metal tree grates."

"Porous Pave is ADA-compliant," said Dave Ouwinga, president and chief executive officer, Porous Pave, Inc. "In addition to making Porous Pave surfaces slip-resistant, the recycled rubber gives it flexibility, so it withstands freeze-thaw cycles without heaving, cracking or breaking."

Made in the U.S.A., Porous Pave XL is a hard, durable material made from 50 percent recycled rubber chips and 50 percent stone aggregate with a moisture-cured urethane binding agent. Porous Pave infiltrates stormwater on site, decreases the volume and slows the velocity of runoff flowing into storm drains and storm sewers, improves water quality by reducing erosion and filtering out pollutants, and recharges groundwater. Porous Pave is engineered with 29 percent void space. Independent testing confirms that Porous Pave allows up to 6,300 gallons of water per hour per square foot to drain directly through its surface, permeate down into a compacted aggregate base, and then slowly filter into the ground

Porous Pave is poured in place at thicknesses of one to two inches atop a compacted aggregate base of two, four or six inches, depending on the application and required compressive strength. Contractors use it in public, commercial and residential installations for loading docks, parking lots, driveways, building entryways and courtyards, walkways and sidewalks, and patios and terraces. The material's porosity, permeability and slip resistance make it ideal for tree surrounds.

Porous Pave XLS, a softer formulation, is made from 100 percent recycled rubber chips and a more flexible urethane binding agent. Landscape architects specify it to provide a more impact-absorbing surface in applications such as playgrounds and pool surrounds.

Named "America's Greenest City" by Fast Company magazine, Grand Rapids. Mich. has received worldwide recognition for its sustainability efforts. Grand Rapids is blessed with abundant natural resources, and it is committed to protecting and preserving this very special environment. The city's multi-year Sustainability Plan sets more than 200 specific targets in sustainability, energy efficiency, conservation and renewable energy. Progress achieved has reduced energy consumption and greenhouse gas emissions, resulting in significant cost savings and numerous social and environmental benefits.

Upcoming Tradeshow for Porous Pave
Porous Pave, Inc. will exhibit at the American Public Gardens Association (AGPA) annual conference (the world's largest annual gathering of public horticulture professionals), June 22-26, 2015, Hyatt Regency Hotel, 1300 Nicollet Mall, Minneapolis, Minn. Porous Pave will conduct a workshop on porous pavement installation in the exhibit hall at 4:30 p.m. on Wednesday, June 24, 2015.

About Porous Pave
Porous Pave, Inc. (Grant, Mich.) manufactures Porous Pave, a highly porous, durable and flexible surfacing material consisting of recycled rubber, aggregate and a binding agent. With 6,300 gallons per hour per square foot permeability, Porous Pave is a superior solution for stormwater retention. Every 1,000 square feet of two-inch Porous Pave uses rubber recycled from 300 tires. It is resilient and slip resistant. A pour in place material, Porous Pave conforms to any landscape design and installs on grades up to 30 degrees. Porous Pave is easy to install. Using a standard mortar mixer, mixing time is under a minute. Curing time is only 24 hours. For technical specifications, independent lab test results and distributor locations, visit

Contact Information

  • Media Contacts:
    Porous Pave, Inc.
    David Aquilina
    Strategic Storyteller
    Email Contact

    City of Grand Rapids
    Steve Guitar
    Communications Director
    Email Contact