The intensive green roof uses planting mediums that have greater depth than the extensive green roof. The total area of sites was 31.2 hectares. Extensive green roofs are the simplest to install and are very often added to existing roofs. Intensive systems allow the designer to create a park-like setting so they are the … A variation of the extensive green roof is called semi-extensive. The planting medium in extensive green roofs ranges from 1.6 to 6 inches deep and while deeper systems have been installed they are not favored as much as the shallower systems.Drought-tolerant sedums (succulent plants) and grasses are the typical plants used since they are shallow-rooted and use little water.Plant diversity on these roofs is kept low to simplify care and to be sure all plants have similar moisture requirements. Green roofs offer many public, private, and design-based benefits. The extensive green roof The extensive type of green roof, by contrast have a soil depth of 50-150mm, only support very drought tolerant plants (no irrigation) are too harsh an environment for most common weeds and so require very little maintenance. [CDATA[ It also allows for a formal garden to be installed with paths, grass lawn and flowers or pot plants. Extensive (Li et al., 2014) 1: Modeling: Baltimore-Washington Green Flat Roof. OPTIMO roofs are optimally layered flat roofs where the desired slope is achieved with FIBRANxps inclination thermal insulation boards instead of the heavy inclination concrete. // ]]> Intensive green roofs are widely used on commercial buildings where owners want to have large green areas that incorporate all sizes and types of plants. Blackdown Intensive substrate is required; the substrate contains more organic matter than other green roof types, and is designed to support a wider variety of plants and trees. During dry times these rooftops may turn brown, only to revive with rain. Typically, extensive green roofs rely on a mixture of grasses, mosses, sedums, sempervirums, festucas, irises and wildflowers plants that are native to drylands, tundras, alvars and alpine slopes. Intensive green roofs are not only found on buildings, but also over underground constructions such as car parks. Green roof expert and trainer Dusty Gedge explains how to specify a green roof Extensive roofs are lower maintenance that intensive ones and lighter in weight. Intensive green roofs are comparable to soil-bound green areas, such as gardens and park landscapes. However, this depth also means that an intensive green roof adds a lot of weight to a building, which your architect or structural engineer will need to account for. Extensive roofs (click here for more) are more often used for single family and multi-family residential buildings. Intensive and extensive green roofs. You can get a wider variety of plants suited to the conditions offered by this option. Increased longevity of roofing membranes. Questions? To bear this weight, an expensive, custom, support structure is required. The depth of an intensive green roof ranges from 15 cm to as much as 150 cm, and can easily weigh as much 300 to more than 1500 kg/m2. Depending on the source you look at these roofs may add 10 to 35 pounds per square foot to a roof’s load. Sound proofing. - Application with blowtorch. Green roof coverage 100%. Blackdown Intensive green roofs have a typical substrate depth that ranges from 200-1500mm and require a permanent irrigation system and regular maintenance. Rubber crumb or playtop Thus, they have more substantial structural loads and need more frequent maintenance … Intensive green roofs are the heavy-weights, literally, of the green roof world. The installation and maintenance costs of an extensive green roof are relatively low compared to intensive green roofs. Extensive green roof: $8 to $20 per square foot. If you continue to use this site we will assume that you are happy with it. The word ‘intensive’ actually refers to the amount of input required to maintain a green roof. Garden Roof® Assembly: Intensive - The landscape possibilities with an Intensive Garden Roof® Assembly are virtually limitless. When the water falls on a typical roof, it’s often funneled off into storm water drains, collecting pollution along the way and polluting our waterways or increasing the amount of sewage to be treated. Could you please tell me botanical names of 10 small trees for intensive roofs for an area like Melbourne, Australia. Pedestal supported. The vegetation for this roof needs a lot of water and regular maintenance. The word ‘intensive’ actually refers to the amount of input required to maintain a … Another term for these green roofs is “rooftop garden.” Semi intensive green roofs, as their name states, are a combination of the aforementioned two types. Normally they i… A semi-intensive green roof can give rise to a richer ecology with more diverse plant and animal species. Cost. [CDATA[ An extensive green roof offers a number of advantages over an intensive green roof. There are many modular green roof kits available that might bring the costs down. They therefore need to be installed on a much stronger structure. A typical growing medium depth … Intensive green roof: - Waterproofing: Adhered two-layer bituminous membrane (SBS) - Thermal insulation: Extruded polystyrene (XPS) - Finish: Intensive vegetation ADVANTAGES: - Waterproofing resistant to root penetration. All plants will have fertilizer and water needs and many will require clipping and pruning. Reduced storm water runoff. hey there!! - Waterproofing with high elasticity and great durability. These roofs will have grasses, ground covers, flowers, shrubs and even trees. These green roofs also fit outbuildings like sheds and garages very well. Planting can include lawns, shrubs, edible plants, … Green roofs ‘harvest’ rain water and put it to beneficial use. Wallbarn supplies intensive green roof systems with soil substrates over 1 metre deep. I was turned on to this by a group on facebook. //