Nuts & Bolts: When It Rains, It's Porous
(Page 4 of 5)
March/April 2008
By Dan Orzech
Maintain the Drain
To keep the water flowing through a permeable driveway, vacuum up debris periodically. (Broom sweeping actually drives dirt deeper into the pavement.)
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■ Permeable pavers require occasional blowing of dust and leaves.
■ Pervious concrete and porous asphalt require periodic vacuuming.
■ In southern climates, you may need to vacuum every few years. In northern climates—where roads are sanded in winter—you may need to do it twice
a year.
■ To increase vacuuming effectiveness, pressure-wash the surface to loosen buildup of debris.
■ Plant or grade slopes away from the driveway to keep soil from eroding or draining on it.
Resources
contractors and information at Concrete Network
Modì porous paving grid at Green Innovations, (888) 725-7524
EcoGrid pavers at Hanover at Architectural Products, (800) 426-4242
Grasspave2 and Gravelpave2 porous grids at Invisible Structures, (800) 233-1510
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