Engineers and Engineering Information

education_providerStormwater management, reduced site disturbance, multiple-use surfaces, urban heat island mitigation, drainage, and strength are some of the benefits of our product line. Choose Invisible Structures line for cost-effective and efficient solutions to most of your site development needs. Download technical specs, design details, BIM Objects, white papers, or view project profiles.

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Rainstore3 is 94% void space for an efficient water storage chamber. Rainstore3 is strong, for use in H-20 loading areas. Rainstore3 can exfiltrate water through the bottom and all for sides.

  • H-20 and HS-20 Loading
  • 94% Void Space for Water Storage
  • Harvesting, Detention, or Retention
  • Stackable and Modular



Draincore2 is the strongest drainage layer on the market – 2100 psi. Draincore2 can be used in vertical, horizontal, or curved applications. Draincore2 moves water at twice the volume as pipe – french drain systems.

  • 2100 psi – 14,479 kPa
  • 42 gallon per minute per foot width
  • Foundation Drainage
  • Green Roofs



Filtering pollutants, containing aggregate, urban heat island mitigation, and stormwater mitigation are some of the advantages to Gravelpave2. Strong and flexible, Gravelpave2 can replace asphalt and concrete in most cases.

  • Fire Lanes
  • Porous Parking Lots
  • Boat Ramps
  • Trails and Access Roads
  • 15,940 psi, 2.29 million psf, 109,906 kPa
  • Attached Filter Fabric Backing



Grasspave2 can provide multiple-surface uses including stormwater mitigation, parking, green space, and urban heat island mitigation. Grasspave2 is strong enough for helicopter landing pads and fire truck outriggers.

  • 15,940 psi, 2.29 million psf, 109,906 kPa
  • Helicopter Landing Pads
  • Parking Lots
  • Fire Lanes
  • Swale Reinforcement
  • Stormwater Filtration, Drainage, and Storage



Slopetame2 can provide much needed NPDES Phase II protection for in-progress construction and finished sites. Integrated fabric, bars, rings and grid, and anchored with Duck-Bill anchors, Slopetame2 is the premier erosion control mat.

  • Swale Reinforcement
  • Riverbank Stabilization
  • Infiltration Trenches
  • Detention Pond Protection
  • Scour Protection



Scour protection at pipe outlets and channels, erosion control for embankments and hillsides, and light-duty grass paver parking – All perfect applications for Terratame2.

  • Scour Protection
  • Erosion Control
  • Light-Duty Grass Parking