Why Invisible Structures?

Our Commitment

What started in a garage in 1982, has grown to be the industry’s trusted choice in porous paving and modular underground water containment. Founded by a Landscape Architect, Invisible Structures is committed to maintaining the values upon which we were built: the highest quality sustainable product, unparalleled customer service and the finest aesthetics available.

Designed by a Landscape Architect for Landscape Architecture

With creative project goals at the forefront of its inception our products were created with designers in mind. The invention of each product came from the desire to address a specific landscape design challenge. Our painstaking attention to detail in the design process yielded products that have been reliable since 1982.

Our Unique Shape

Our trademark ring-on-grid design is what gives our products their competitive advantage. Evenly spaced rings make for a flexible yet strong structure with no stress points and independent weight distribution.

The Strength Contest is No Contest.

Our lab-tested products withstand an astonishing amount of compression due to our proprietary blend of recycled plastic and trademark ring-on-grid design. Each independent cylinder transfers the load to the weight bearing base course protecting vegetation or decorative gravel while supporting the weight of any vehicle. This chart illustrates Grasspave2 and Gravelpave2’s overqualifications in measurements of pounds per square inch (PSI).

Type of Vehicle/PavingI PSI
Car & Pick-up Truck 45
Utility, Delivery, H-20 loading 60
Fire Truck H-20 110
Semi Truck Tire 120
DC-10 Airplane 250
Concrete 3,000
Grasspave2/GravelPave2** 15,940

**Over 5 times the strength of concrete

Flexibility Advantages

Due to our trademark design and proprietary blend of HDPE 100% recycled plastic, our products offer distinct design and installation advantages. Most products roll out like carpet making for an easy installation and labor cost reduction. Products can be trimmed with pruning shears and will bend slightly to accommodate surface imperfections and curves for layout and design customization.

Void Space Advantage

Our founding product designer felt it was important for our products to achieve results without interfering with the landscape aesthetic. He streamlined the designs to optimize space for root growth, unparalleled water storage and virtually invisible products.

Quick, Cost Effective Install

Lightweight large rolls make installation fast and easy requiring fewer man-hours than other products. For example, a 430sf installation of Grasspave2 (product only) requires approximately 5 minutes of labor. A full installation of the same size, including product, sand, Hydrogrow and sod/seed can be completed in about an hour.

Why Sand Instead of Soil

Soil can easily compact and become impermeable creating mud, ruts and “bath tubbing”. Because sand never compacts it remains porous allowing the roots to thrive, providing an excellent medium for growing any vegetation. The addition of our proprietary Hydrogrow (included with every order of Grasspave2) ensures water and nutrient retention at the base course level to expedite the root growth process after installation.

Sustainable, Recycled, USA

  • Reduces CO2 Levels (Grasspave2, Slopetame3)
  • Increases Greenspace (Grasspave2, Slopetame3)
  • Manages and Preserves Stormwater (All products except Beachrings2)
  • Captures Stormwater for Reuse (Rainstore3)
  • Made from 100% Recycled Plastic (All products)
  • 100% Recyclable Material (All products)
  • Emits Zero Toxins (All products)
  • Naturally Filters Water (Grasspave2, Gravelpave2, Slopetame3, Draincore2)
  • Removes Hydrocarbons through Bioremediation (Grasspave2, Gravelpave2, Slopetame3)
  • Lasts for More Than 60 years if Properly Maintained (All products)
  • Proudly Manufactured in the USA