Disconnection of rooftop runoff

Rooftop disconnection involves directing flow from downspouts onto vegetated areas where it can soak into or filter over the ground.

This disconnects the rooftop from the storm drain system and reduces both runoff volume and pollutants delivered to receiving waters.

To function well, rooftop disconnection is dependent on several site conditions (e.g., flow path length, soils, slopes).
Downspout Grass

Additional Information