Grasscrete, a grass/concrete "invisible" porous pavement grid system, is manufactured by Bomanite Corporation. It's similar to Grasspave², but in concrete instead of plastic. It was designed for use anywhere impervious paving products (asphalt and/or concrete) would be appropriate, especially for the commercial and municipal market. Those areas would include access routes, drainage ditches, and driveways, to name a few. It's also a recognized product for use in erosion control, reduction of storm water runoff, and to meet landscaping zoning requirements. Grasscrete can also solve problems created by natural storm water runoff patterns.

In water management applications, including erosion control, Grasscrete is a viable and cost-effective solution – and it looks a whole lot better than concrete. The overall design helps to release hydrostatic pressure while water infiltrates the system, allowing the grass to grow. A solid drainage system (drainpipe or otherwise) would require a reservoir of some type at one end, but Grasscrete doesn't. It's both an aesthetically pleasing and functional system.

Construction Notes – It's important to determine the proper subgrade for expected loads and drainage. A Geotechnical Engineer may be required, depending on the applications. However, in most applications (except for very heavy loads), native soil with a minimum Resistance Value of 30 and a compaction of 95 percent will provide a suitable subgrade. A testing lab would need to test the subgrade to determine these values, taking into consideration the traffic load that will be using the Grasscrete. In areas with inappropriate soil or very heavy anticipated loads, you'd need to excavate 4 inches or more of soil and replace it with compacted base rock.

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