Invisible Structures, Inc.

Invisible Structures, Inc.

Invisible Structures, Inc., has been in the stormwater management business since 1982 with our porous paving systems Grasspave2 and Gravelpave2, ring and grid structures for grass and gravel drivable surfaces. Large rolls sizes cover areas quickly while either protecting grass roots from compaction or containing small gravel to eliminate gravel migration. Invisible Structures now has a complete line of Stormwater Management Products to choose from. Our products were developed to help manage stormwater and protect and enhance the environment.

Company details

16265 E. 33rd Drive. Suite 20 - Dock Doors 18 to 22 , Aurora , Colorado 80011 USA
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Globally (various continents)
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For 35 years we have provided the finest in grass porous paving, gravel porous paving, underground stormwater storage, erosion control, drainage, and access mats. As we go into our 35th year, we will continue to provide you with the highest quality-environmental-site development and stormwater management products available.

Producing environmentally beneficial and enhancing site development products since 1982. Invisible Structures makes the world's top selling Grasspave2 and Gravelpave2 porous paving systems; Rainstore3, underground stormwater detention system; Terratame2 for scour protection, erosion control, and light-duty grass parking; Slopetame2 moderate-duty erosion control system; Draincore2, geocomposite drainage layer for sports fields, roofs, and planter drainage; and Beachrings2 portable boardwalk mat for wheelchairs over sand.

Grasspave2 the Early Years 
In 1982 our first grass paving system was called Ritterings and was composed of 3' PVC white rings glued onto netting and sold in 4' x 20' mats. It was the start-a-business-in-your-garage approach. In 1988 we began molding 3' black recycled HDPE plastic rings and still glued them onto netting. This roll format made installation very easy for contractors and still is the single most distinguishing feature setting us apart from all modular pavers.

Metric Influence

In 1991 Grassrings 2 (Grasspave2) was introduced as a half-meter by half-meter square of rigid 2' black recycled HDPE plastic. Grasspave2 was introduced in large rolls, for fast installation, based on metric increments.

Stormwater Management and Environmental Concerns

Invisible Structures now has a complete line of Stormwater Management Products to choose from. Our products were developed to help manage stormwater and protect and enhance the environment.

Invisible Structures, Inc. is dedicated to providing a TOTAL STORMWATER MANAGEMENT system for your site. Our products offer economical and innovative solutions to meeting your NPDES Phase II and local requirements. Our product line will not only make post development stormwater run-off equal to pre development run-off, we will enhance the quality of stormwater and provide human and economic benefits.



  • Recharges Groundwater Supply
  • Stormwater Harvesting for Reuse
  • Reduces Runoff Volume
  • Stores Large Volume of Water
  • Available for High Water Tables

Grasspave2 and Gravelpave2

  • Cleans Automobile Drips of Hydrocarbons and Other Pollutants (Bioremediation)
  • Reduces Runoff Volume
  • Reduces Runoff Rates
  • Stores Water in Cross-Section
  • Recharges Groundwater Supply
  • Reduces Soils Migration and Erosion


  • Reduces Soil Migration and Erosion
  • Biofiltration and Bioremediation in Swales
  • Detention/Retention Pond Support and Containment


  • Biofiltration of Stormwater
  • Reduced Stormwater Runoff Rate
  • Reduced Stormwater Volume
  • Conveyance for Treatment and Reuse
  • Reduced Non-Point Source Pollution

Invisible Structures, Inc has been committed to 'green' building for more than twenty years, with a suite of products which not only protect the environment, but actually enhance it.

LEED™ Points
As a member of the USGBC, Invisible Structures is committed to helping your design earn LEED™ Points. Download our LEED™ 3.0 Category Guide, our LEED™ 3.0 Product Guide, and our State of the Earth Innovation! brochure for quick references for potential points. Visit our LEED™ page for more information.

Pollution Removal
Our product line can filter out Moderate amounts of pollutants and solid waste from rainwater infiltration. Click here for pollutant removal information.

Tree Preservation
Old growth trees can be saved and new growth vegetation can be planted by substituting our product line for traditional development practices. Grasspave2, Gravelpave2, and Slopetame2 allows for oxygen, carbon dioxide, water, and nutrients to pass freely to the root zone. Asphalt and concrete suffocate trees. Draincore2 is a water and air drainage conveyance which enhances vegetation growth. Download our Tree Preservation Detail and our Tree Protection Paper.

Urban Heat Island Mitigation
Grasspave2, Gravepave2, Slopetame2 and Draincore2 can reduce the urban heat island effect. Click here for more information.

Recycled Material
Our products effectively filter pollutants from rainwater runoff, reduce runoff volume and rate.