Water runs through the gravel and geotextile membrane across the ENTIRE surface so this is a true porous paving product.
"Pervious surfaces can be either porous or permeable. The important distinction between the two is:
- Porous surfacing is a surface that infiltrates water across the entire surface.
- Permeable surfacing is formed of material that is itself impervious to water but, by virtue of voids formed through the surface, allows infiltration through the pattern of voids."
-CIRIA (the construction industry research and information association)