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Green Roofing

A green roof is a roofing style of buildings whereby the roof is partially or fully covered with vegetation and a growing medium planted over a membrane that is waterproof. Green roofs/living roofs help reduce the adverse side effects of conventional roofing while adding green space to your property. They consist of various roofing layers topped with a soil-like growing medium and plants chosen for their ability to withstand a roofs extreme conditions. Conventional roofs may do a good job of keeping your house dry, but their environmental consequences prove less beneficial. Green roofs on the other hand offer a range of benefits for both your home and the environment, i Including: * Acting as an additional insulating layer to reduce unwanted summer heat gain and winter heat loss. * Capturing, filtering and slowing roof runoff. * Extending the life of the roof itself by protecting the waterproof membrane at its foundation from sunlight or puncture damage * Helps to decrease the stress of the people around the roof by providing a more aesthetically pleasing landscape. * It contributes to lower urban air temperatures and is influential in mitigating the heat island effect. * Help to insulate a building for sound with the aid of both the soil interface and the crops which block high frequencies. * Reduction in energy use is an important property of green roofing. By improving the thermal performance of a roof, green roofing allows buildings to retain their heat during the cooler winter months better while reflecting and absorbing solar radiation during the hotter summer months, enabling buildings to remain cooler. Green roofs are grouped into two unique types that are the intensive roofs, which are thicker, with a minimum depth of 12.8 cm and support a wider variety of plants but have more weight and extensive maintenance requirements. On the other hand, extensive roofs are lighter suitable for shallow crops and dont require much maintenance as compared to their counterparts. The main disadvantage of green roofs is that the initial cost of installing a green roof can be double that of a standard roof. Depending on what kind of green roof it is, the maintenance costs could be higher, but some types of green roofs have little or no ongoing cost. Certain kinds of green roofs also place greater demands on the waterproofing system of the structure, both because water is retained on the roof and due to the possibility of roots penetrating the waterproof membrane. Another disadvantage is that the wildlife they attract may include pest insects which could easily infiltrate a residential building through open windows. Although more expensive up-front than conventional roofing, the extended lifespan of a green roof makes it cost-competitive over the long term.

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