1、Green Roof,today,we will show yours some picture of green roof ,and we will give you some information about it .what we give is just a short introduction . If you are interested in it ,i think it is better for you to consult more resources.you can take it as a common sense or the opportunity to wide
2、n your knowledge of architecture . it all depends on you !,what is green roof ？,A green roof is a roof of a building that is partially or completely covered with vegetation and soil, or a growing medium, planted over a waterproofing membrane. This does not refer to roofs which are merely colored gre
3、en, as with green roof shingles. It may also include additional layers such as a root barrier and drainage and irrigation systems. Container gardens on roofs, where plants are maintained in pots, are not generally considered to be true green roofs, although this is an area of debate. Rooftop ponds a
4、re another form of green roofs which are used to treat greywater. Finally, the term “green roof“ may also be used to indicate roofs that utilize some form of “green“ technology, such as solar panels or a photovoltaic module. Green roofs are also referred to as eco-roofs, vegetated roofs, living roof
5、s, and greenroofs.,the origin of the green roof？,Modern green roof technology began in the early seventies in Germany when the first green roof systems were developed and marketed on a large scale. Unlike former “green roofs” this first approach offered reliable technology that provided sophisticate
6、d irrigation and protection against root ingress for rooftop gardens. The second big step was the development of extensive green roofs in the late eighties. The goal was to create lighter and cheaper systems which could be applied to large flat roofs. The main motivation for extensive green roofs wa
7、s the restoration of nature and protection of the roof membranes from the elements and temperature fluctuations. As extensive green roofs became subjects in scientific research, additional benefits began to gain importance. Today, ecological benefits such as reduced energy consumption for heating an
8、d cooling, stormwater retention, and heat island mitigation are the main reasons for the growing popularity of green roofs. Other benefits include habitat restoration, filtration of acid rain and air pollutants, noise pollution reduction, and the therapeutic effects found from being in the presence
9、of nature.,the benifits of the green wall,before green infrustructure,aftergreen infrustructure,For the Building Owner: Expand roof life 2x3 times (up to 60 years) ;Reduce air-conditioning costs;Reduce winter heating costs ;Improve public relations;Transform dead space into garden space;Stormwater m
10、anagement tool For the Community:Reduce stormwater runoff ;Reduce city “heat island” effect ;Reduce smog and improve air quality;Reduce noise ;Reduce energy demand ;Improve aesthetics;Provide green spaceFor the Community:Reduce stormwater runoff ;Reduce city “heat island” effect ;Reduce smog and imp
11、rove air quality;Reduce noise ;Reduce energy demand ;Improve aesthetics;Provide green space,Green Roof Assembly,Insulation,Drainage,Growing Medium,Waterproofing,Structural Support,Structural Support,Increase # and size of Rafters,roof joists,Steel I-Beams,Custom roof truss,Suspension,Waterproofing M
12、embrane,Three major types: 1、Single-Ply Thermoset membranes (ex. EPDM)热固性膜 Synthetic（合成的） rubber roofs, chemically cross-link, seams cure, single-ply Sheet widths 7 - 50 ft Low cost Thermoplastic membranes (ex. PVC, TPO)热塑性塑料薄膜 Seams welded together with solvents or heat, single-ply Panels（面板、嵌镶） ar
13、e overlapped and fused together creating a monolithic sheet单面板 Can be reusable if installed correctly though it is not recyclable 2、Built-up Modified bitumen membranes (rubberized asphalt) Combine asphalt with modifiers and reinforcement materials, torch-down roof Have been used for 30+ years 3、Flui
14、d applied membranes Lightweight Can topcoat existing membrane Water based, non-toxic, no V.O.C. Self flashing, self sealing,Insulation,Rigid Insulation - extruded polystyrene（挤塑聚苯乙烯） Available in various thicknesses (0.5 - 4 inches) Also available tapered provides drainage on flat roofs (0% slopes)
15、Advantages: Placed ABOVE the membrane (IRMA) - provides protection for the membrane from potential traffic, maintenance, and weather related damage. Provide freeze protection for plants when used on roofs without heated space below,Drainage,DrainageAllows excess water in growing medium to exit roof
16、quickly and unobstructed Prevents roots from rotting due to prolonged saturation Provides oxygen to plant roots and growing medium Can be combined with a root barrier Can also store water for drought conditions,Growing Medium,Green roof soil must play many roles: 1. Efficient at absorbing and retain
17、ing water 2. Ability to absorb and supply nutrients 3. Free draining 4. Provide anchorage for plants 5. Lightweight 6. Ability to maintain mass (does not shrink) = Achieved by using non-organic granular mineral materials mixed with fine particles Media blend tuned for specific plant composition (organics, sand),Maintenance,Maintenance intensity depends on the type of green roof,Maintenance Schedule -Watering -Debris removal (leaves, sticks, acorns, etc.) -Weeding -Fertilizing (slow release) -Cutting,Green Roof Products Today,Thanks,End,
