A green roof has many advantages and different green roof systems can be distinguished. In an inexorably urbanizing world, green roofs could be an interesting tool to conciliate the greening of cities with ecological services. Roof Gardens have a deeper growing medium than Extensive Green or Brown Roofs because trees, shrubs, turf, and hard landscaping can be incorporated into the design. A green roof offers many benefits in terms of sustainability, the environment and perceived value. Green roofs are versatile and can include a vast array of different plants or designs. This paper will give basic information on green roofs, their advantages, construction elements, as well as different substrate types and features. Green roofs are vegetated layers that sit on top of waterproofed roof surfaces of a building. The environmental benefits provided by green roofs derive from their functioning as ecosystems. Standards relating to flat roof and green roof construction distinguish between different types of green roof. This page provides a brief overview of the role of green roofs in mitigating the heat island effect, including green roof types, other environmental and social benefits, and cost-benefit considerations. Green roofs are covered with plants and can improve air quality, reduce water runoff and insulate homes to reduce urban heat islands. The vegetation converts CO2 into oxygen and filters particulate matter from the air. Intensive green roofs require the deepest soil and have the greatest impact on the structural design, but they also accommodate all types of plantings including large shrubs and trees. Green roofs are usually covered with an artificial soil or growing medium to minimise roof loads but earth-sheltered homes often use heavier natural soil as a continuation of the indigenous site conditions. These terms refer to the degree of maintenance the roofs require, and the level of vegetation that can be utilised. Green roofs have been proven to help reduce heat islands. Submit your projects before February 14th to secure a special Early Entry Discount.. Green roofs are making a comeback. WHAT ARE GREEN ROOFS? Below we explain the benefits one by one. Three types of green roofs exist: extensive, semi-intensive, and intensive green roofs. Each green roof is unique, as their designs and performance vary by region, climate, and building type and use. A truly unorthodox type of roof, the green or living roof nevertheless holds much promise. Green roofs are part of climate-proof construction. These types of green roofs are covered by lighter vegetation and are easier to maintain than the intensive green roofs. Green roofs have excellent noise attenuation, especially for low frequency sounds. What are Green Roofs. General characteristics of extensive and intensive green roofs (adapted from Green Roofs for Healthy Cities and the Cardinal Group, 2006). Thanks to its simplicity, it costs less to build than an intensive green roof. What's more, people are happier in a green environment than in grey surroundings. Noise Reduction. Plant finishes; depths and types of substrates; and drainage boards are all carefully considered in each green roof system to allow the roofs to flourish. The basic anatomy of a green roof consists of vegetation, growing medium, filter membrane, drainage layer, waterproof/root repellant layer, roofing membrane support for plantings above, thermal insulation, vapor control layer, and structural roof support. Link to this table. There are three main categories of green roofs: Extensive – This is the simplest kind of green roof, involving small plants and greenery that … All three types of roofs require specific layers of roofing materials not found on regular roofs. A Bauder green roof combines the finished planting scheme and all its supportive components with a high quality and secure waterproofing system to give you the best results every time. The following table summarizes characteristics of the different types of green roofs. Comparison of the various green roofs An extensive green roof is characterised by its low weight, a thin layer of growing medium (green substrate), a mix of plants adapted to conditions on the roof, minimum maintenance and low installation costs. This is better for the climate and for health. However, they need extra structural support, a vapor barrier, thermal insulation, waterproofing, drainage, water filtration, soil, compost and plants. GREEN ROOFING TECHNOLOGY M. ARAVIND MBBS I YEAR DSMCH, PERAMBALUR 2. The types of plants that you will have will depend on the type of green roof you are installing. Their roofs are essentially green roofs and usually deep (intensive) roofs that need considerably more structural support than the more shallow extensive type. It can put oxygen back in the air, provide thermal insulation to your house, absorb rainwater, and even allow you to grow plants. Green roofs are becoming very popular, especially with house owners who have an eye for nature and also with companies and towns that are paying more and more attention to ecological management. In urban areas in particular, green roofs can significantly improve air quality. They are mainly developed for aesthetic purposes, but also have various advantages to the environment. The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering. 8. The roof structure will require extra loading capability to withstand the weight of the roof garden and support an irrigation system for maintenance, if required. Usages vary slightly from region to region, or from one builder or architect to another. Enter it in the 8th Annual A+Awards for a shot at international publication and global recognition. Types of GREEN roof construction and plants used in them. This style of roof requires regular maintenance, including weeding and pruning. Roof terminology is also not rigidly defined. Green roofs are capable of reducing electromagnetic radiation penetration by 99.4% (Herman 2003). Green roof presentation 1. Intensive green roof • Depth 10 inches and more • Supports trees and shrubs • Initial investment is high • Heavier than both the types • Requires more maintenance 8 9. Living roofs Vegetated roofs Eco roofs Roof gardens DEFINITION: A green roof is a planted roof top Container gardens on roofs are not generally considered to be true green roofs. These areas are more like small parks rather than roofs. 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