AirDrain is capable of holding .576 gallons of water per sqft. if needed until it can evacuate from the green roof to the perimeter exit drains, which is a holding capacity equal to approximately 6 inches of compacted gravel.
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Build a better green roof with AirDrain. What drains better than air !
Unlike traditional shock pads or e-layers the AirDrain grid is 1″ high, extremely light weight at 3.1 lbs per 7 sqft., 233 psi (unfilled) and has a 92% air void.
Installing the AirField System in green roof applications results in a more stable surface area and a more consistent GMAX across the project. AirDrain’s delivers a 14.7% reduction on cement and a 19% reduction on an aggregate base in GMAX. And that reduction and consistency will stay for the life of the field with AirDrain .
Here is the ASTM D4716 Flow Rate per Unit Width and Hydraulic Transmissivity Testing for actual drainage capacity, at a 1/2% slope. The AirDrain will actually drain 171 inches per hour.
