Green Roofs are roofs that are substantially covered with living plants. Although historical and archaeological evidence suggests that green roofs have been built for more than three thousand years, widespread acceptance has always been limited by the structural cost of supporting heavy soils and by the technical challenges of low-slope waterproofing. Recent advances in membrane waterproofing technology combined with the development of lightweight thin-profile green roofs have finally made green roofs practical for most new construction: There are now more than one billion square feet of lightweight green roofs!
WHY BUILD GREEN ROOFS?
Although the structural, waterproofing, and drainage requirements of green roofs will always make them more expensive than bare roofs, green roofs offer significant long-term economical and environmental advantages that more than justify the higher initial cost:
- Green roofs are visually attractive. The variegated coloring of flowers, grasses, and wild herbs is more appealing than stark black or white monolithic surfaces. Green roofs can transform urban wastelands into urban gardens.
- Green roofs are energy-efficient. They are cool in the summer and can be as effective as white roofs in reducing the urban heat island effect. The thermal mass of the soil reduces heat gain and loss by isolating the building from temperature extremes.
- Green roofs significantly reduce storm water runoff, typically retaining half to three-quarters of the annual rainfall and retarding the runoff of most of the remainder.
- Green roofs are permanent. By shielding the waterproofing from the sun and reducing temperature swings, synthetic membrances can last fifty years and more.
Leiyuan Greening Solution provide all kinds of green roof products, like grass grid, drainage board, water tray, drainage sheet etc for customers from more than 60 countries and areas. If you have any interests, please feel free to contact us for more details!