The Constructor

Cool Roof System for Buildings – Types and its Benefits

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Cool roof system for buildings is a roofing system that can deliver high reflectance (the ability to the visible, infrared and ultraviolet wavelength of the sun, reducing heat to the building) and high thermal emittance (the ability to release a large percentage of absorbed, or non-reflected, solar energy) is a cool roof. Cool roof can be used as a geo-engineering technique to tackle global warming based on the principle of solar radiation management, provided that the materials used not only reflect solar energy, but also emit infra-red radiation to cool the planet. Cool Roof System for Buildings Most of the roofs in the world (including over 90% of the roofs in the world) are dark colored. In the heat of the full sun, the surface of a black roof can increase in temperature as much as 90 degrees F, reaching temperatures of 150-190 degrees F (66 to 88 degrees C). This heat increase can contribute to: Cool roofs offer both immediate and long term saving in building energy costs. White reflective membranes, coated roofs and planted or green roofs can:

Types of Cool Roofs System:

Green Roofs:

The term Green roof is used to indicate Roof that utilize some form of Green technology. Green roof is roof of a building that is partially or completely covered with vegetation and soil, or a growing medium, planted over waterproofing membrane. Rooftop ponds are another form of Green roof which are used to treat gray water. It also used to indicate roof that utilizes some form of Green Technology such as Solar panels or a Photovoltaic Module. A Green Roof consists of a drainage layer and a waterproof membrane typically covered in a thin layer of 2-4 inches of soil compacted with low growing plants. Local weather conditions, temperature, and structural factors should determine the appropriate types of plants that are used. Common plant species include sedum, alpines, delosperma, succulents, and a wide variety of grasses and mosses.            

Benefits of green roof:

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