Sewer Manhole Articles

  • Gravelpave2 & grasspave2 vs porous asphalt and porous concrete

    Background - Gravelpave2 is an evolutionary product derived from Grasspave2, which had to go through fire department approvals city by city for years. Each new product seems to require the same process, whether we like it or not. The strangest thing to us is that after 18 years making and selling porous paving, there are still communities that demand only asphalt or concrete for paving surfaces. ...


    By Invisible Structures, Inc.

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