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. However, they need extra structural support, a vapor barrier, thermal insulation, waterproofing, drainage, water filtration, soil, compost and plants. Semi-intensive green roofs represent a roof design intermediary between extensive and intensive roof. Green roofs are versatile and can include a vast array of different plants or designs. This style of roof requires regular maintenance, including weeding and pruning. Green roofs. Green roofs have been proven to help reduce heat islands. Succulents, particularly colourful sedums, dominate shallow substrate green roofs across temperate Europe and North America. 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. Green roof presentation 1. 3 Different Green Roof Types . The plants used in this type of green roof are mostly sedum varieties. A green roof has many advantages and different green roof systems can be distinguished. 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. A green roof absorbs rain water by the water buffering in the plants, substrate and drainage layer. In order to reduce differences based on roof types, we will only deal with the extensive roof type. WHAT ARE GREEN ROOFS? 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. A truly unorthodox type of roof, the green or living roof nevertheless holds much promise. Green roofs are capable of reducing electromagnetic radiation penetration by 99.4% (Herman 2003). Green roofs mainly consist of a vegetation layer consisting of trees, plants, and other shrubs, a substrate layer where water is retained and in which the vegetation is secured, and a drainage layer which helps to evacuate excess water. Seed mixtures can be bought specifically for green roofs. 8. Enter it in the 8th Annual A+Awards for a shot at international publication and global recognition. Types of green roof plants Low-growing succulents. As well as protecting buildings and adding character to the urban environment, green roofs can help to manage rainfall and create diverse new habitats for plants, wildlife, and people. Intensive systems allow the designer to create a park-like setting so they are the best option for roof … Green roof: types, construction & pros and cons. Got a stunning green roof project of your own? In urban areas in particular, green roofs can significantly improve air quality. Roof shapes differ greatly from region to region. All three types of roofs require specific layers of roofing materials not found on regular roofs. They are mainly developed for aesthetic purposes, but also have various advantages to the environment. Intensive – These roof types can support trees, shrubs, and even benches. The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering. There are three main categories of green roofs: Extensive – This is the simplest kind of green roof, involving small plants and greenery that … Their roofs are essentially green roofs and usually deep (intensive) roofs that need considerably more structural support than the more shallow extensive type. Thanks to its simplicity, it costs less to build than an intensive green roof. 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 paper will give basic information on green roofs, their advantages, construction elements, as well as different substrate types and features. Green roofs come in many different forms and types, including extensive, intensive and biodiverse or brown roofs. An extensive green roof has the benefits of an intensive one, without the heavy landscape and garden appeal. Their estimated lifespan is 40 years. GREEN ROOFING TECHNOLOGY M. ARAVIND MBBS I YEAR DSMCH, PERAMBALUR 2. 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. While there are an infinite number of potential designs for green roofs, there are two principal types:intensive and extensive.There is another type of green roof, known as ‘semi-intensive’, which lies somewhere between the intensive and extensive varieties.The difference between these types comes down to the depth of the material which is placed on the roof. Green roofs are part of climate-proof construction. Types of Green Roofs. These types of green roofs are covered by lighter vegetation and are easier to maintain than the intensive green roofs. The following table summarizes characteristics of the different types of green roofs. A green roof offers many benefits in terms of sustainability, the environment and perceived value. Green roofs are covered with plants and can improve air quality, reduce water runoff and insulate homes to reduce urban heat islands. These areas are more like small parks rather than roofs. Standards relating to flat roof and green roof construction distinguish between different types of green roof. What's more, people are happier in a green environment than in grey surroundings. The types of plants that you will have will depend on the type of green roof you are installing. Roof terminology is also not rigidly defined. General characteristics of extensive and intensive green roofs (adapted from Green Roofs for Healthy Cities and the Cardinal Group, 2006). What are Green Roofs. A green roof, or rooftop garden, is a vegetative layer grown on a rooftop. They require complex structural support and irrigation. Types of GREEN roof construction and plants used in them. Extensive Green Roofs. Submit your projects before February 14th to secure a special Early Entry Discount.. Green roofs are making a comeback. Extensive green roofs have a shallow growing medium and generally use plant communities designed to tolerate the intense sun, wind and drought conditions of a roof … Usages vary slightly from region to region, or from one builder or architect to another. 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. Extensive Green Roof. 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. Each type of green roof brings different benefits, so it is well worth learning more about each system on offer. 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