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→Design
<h3>Materials</h3>
<h3>Materials</h3>
<h4>Stone Reservoir</h4>
The stone reservoir must meet both runoff storage and structural support requirements.
The bottom of the reservoir should be level so that water infiltrates evenly. If the system is not designed for infiltration, the bottom should slope at 1 - 5% toward the underdrain.
A hybrid permeable pavement/soakaway design can feature connection of a roof downspout directly to the stone reservoir of the permeable pavement system, which is sized to store runoff from both the pavement surface and the roof drainage area.
<h4>Geotextile</h4>
<h4>Geotextile</h4>
{{:Geotextiles}}
{{:Geotextiles}}