How much water can be stored underneath the LiveRoof system using RoofBlue DETAIN?
RoofBlue DETAIN raises the modules an additional 3.5” from the roof surface. The void space inside the RoofBlue DETAIN module is approximately 90.5%.
At 3.5”maximum water depth, RoofBlue DETAIN provides up to 455 cubic inches (approximately 2 gallons or 7.4 litres) of water detention per square foot.
The control flow roof drain insert should be even to the lowest point of the green roof installation, the water will not exceed 3.5” in height. This ensures that the plant roots are kept out of standing water.