Designed for use in flat roof applications and as the drainage medium for green roof gardens, KBI Flexi®-Roof is composed of aggregate rock, a proprietary urethane binder and thousands of 3/8" rubber granules made from recycled steel belted radial (SBR) tires. The binding agent penetrates to deliver an immense grip while the rubber granules offer flexibility. In addition, KBI Flexi-Roof weighs approximately 45 lb/psf, mitigating the need for roof ballast. And, because Flexi-Roof is not mechanically affixed to a roof’s waterproof membrane, it will not affect the membrane warranty.
Non-toxic and resistant to substances including chlorine, ozone, bromine, muriatic acid, salt water and oil, KBI Flexi-Roof is can be installed over a variety of materials, including concrete, compacted aggregate and waterproof membrane materials. In addition, freeze-thaw conditions do not interfere with the mechanical strength of Flexi-Roof due to the elastic properties of the urethane and the compression capabilities of the rubber. Finally, the product’s “open-pore” properties enable rapid evacuation of water through its thickness.