This roofing system offers an economical alternative to storm water collection basins and associated land requirements.
The Ballasted Storm Water Retention roof system from Carlisle can retain up to 67 percent of the water from a 24-hour, one inch rain event. The system offers building owners, developers and urban planners an economical alternative to costly storm water collection basins and associated land requirements.
The Ballasted Storm Water Retention roof system consists of a polypropylene protection mat, G4 Drainage mat and two layers of moisture retention mat that are positioned above the EPDM membrane and beneath the normal ballast. The fully saturated weight of the Storm Water Retention components is only 3 lbs. per square foot of roof area.
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