The following selections can substantially aid in stormwater management, along roofs, walls, plazas, and more.
Hybrid Green Roof System
This modular roofing system features Moisture Portal technology and hidden tray lips that connect the roots of each vegetation unit for even water and nutrient distribution across the entire system. In times of excess precipitation, drain channels disperse water at seven gallons per minute for each linear foot. LiveRoof features mature grasses and perennials for a monolithic appearance, but with modular benefits for maintenance and ease of installation. It comes with a 20-year module warranty.
TreeBox’s vertical green cladding panel is made from recycled poly-propylene with a waterproof barrier along a solid back panel. Measuring just under 11 feet squared, each panel weighs 34 pounds empty and can support 150 pounds—including a saturated substrate—when attached to a vertical surface via galvanized steel support rails. Easiwall absorbs 35 to 40 percent of soil volume in moisture. Its modular design is scalable to most building dimensions.
The Silva Cell modular containment system transfers above-grade loads to a compacted sub-base. Increased root space serves as an on-site storm water management system and can hold up to 2 inches of storm water. Each 48-by-24-by-16-inch frame features approximately 92 percent void space for ample soil distribution and can accommodate under-ground utilities. Recently specified to support 33 Maples at Toronto’s Sugar Beach, landscape architect Marc Hallé reported that the trees “look they are on steroids.
Multiple shapes and colors are available in Unilock’s new permeable pavers thanks to the introduction of new face mix technology. The rectangular and square pavers—large and small—feature tight joint tolerances compliant with ADA regulation. The pavers also support rapid storm water infiltration and they are strong enough to support commercial vehicular traffic.
Enka Retain & Drain
Enka Retain & Drain combines effective green roof drainage while promoting root health by retaining requisite moisture. Water retention material is constructed from 100 percent post-industrial recycled non-woven polypropylene that is designed to hold 15 times its weight in water and conforms to irregular surfaces and offsets. The drainage core is made up of 40 percent post-industrial recycled polypropylene filaments entangled in a square waffle pattern that creates an open flow path for water.
Constructed from injection-molded plastic, Rainstore panels are suitable for stormwater storage and retention systems in driving areas and parking lots. Thirty-six vertical columns in each 40-by-40-by-4-inch unit store up to a total of 25 gallons of water, and can be stacked up to 24 high, accommodating more storage than chambers and pipes over a smaller surface area. Its open design also supports exfiltration of stormwater along the bottom and sides of the chamber.
Firestone Building Products
Suitable for critical containment jobs or decorative water features, EPDM Geomembrane is a flexible, easily installable water barrier for constructed wetlands, agricultural ponds, reservoirs, and landscape features. A variety of panel sizes can be specified and, with 300 percent elongation potential, the product can conform to irregular shapes and contours. It is compatible with Firestone’s QuickSeam Tape for seamless connections. It is also safe for fish and wildlife.
This 50-gallon storage tank can be connected vertically or horizontally to other HOGs for increased storage capacity. Constructed from a ¼-inch thick, food-grade plastic resin, the HOG can contain potable water as easily as irrigation or emergency stores. The cistern’s outlet is located on the floor of the tank rather than the side for easier access. Designed in Australia for warmer climates, it can withstand temperatures between 22 degrees and 140 degrees Fahrenheit, thanks to a UV8 stabilizer mixed into the resin.