Definition concepts and principles of Roof Gardens 22164130
- 1. Name: B.YAMINI PRIYA • ID No : 22164130 • Course code and title:22EOPT41- Landscaping 3(2+1) • Course Teacher: Dr. M. Kumeresan Roof Garden’s
- 2. Introduction A roof garden is any garden on the roof of a building. • Besides the decorative benefit, roof plantings may provide food, temperature control, hydrological benefits. • Also provides architectural enhancement, habitats or corridors for wildlife, recreational opportunities, and in large scale it may even have ecological benefits.
- 3. Types of Roof garden Shallow Roof Garden System (growth media depth 2.5” to 4” ideally suited for areas likely to receive little maintenance. Recommended plants include sedums, herbs and grasses. • The anticipated weight above the membrane assembly is generally between 4.8 and 6 pounds per square foot, per inch of system depth, in a saturated state. - Shallow ultra Extensive
- 4. Medium Depth (Extensive) Roof Garden System Medium Depth Roof Garden System (growth media depth of 5” to 8”) includes plants such as sedums, herbs, grasses and other vegetation, which can grow in this depth of media. Un-irrigated systems can be provided without difficulty; however, drip, mist or spray irrigation systems may be required to support more diverse plant types or for installations in semi-arid climates. • The anticipated saturated weight above the membrane assembly is less than 50 pounds per square foot.
- 5. Materials Needed to Create a Rooftop Garden Typical materials for a rooftop garden may include: Plants Growing containers • Growing medium Decking or other material that can be walked on and Seating, wildlife features, greenhouses or composters
- 6. HEIGHT AND WEIGHT CALCULATION TABLE FOR EXTENSIVE GREEN ROOF SYSTEM
- 7. Deep (Intensive) Roof Garden System Deep Roof Gardens typically incorporate a planting system requiring greater growth media depth (exceeding 8”) that requires regular maintenance, such as watering, fertilizing and mowing/weeding. A variety of plants are available including turf grass, annual or perennial flowers, shrubs and even small trees. This system typically requires a This system structural concrete roof roof deck deck to support the larger dead load. An irrigation system should be utilized in these assemblies. • The anticipated weight above the membrane assembly is generally greater than 50 pounds per square foot.
- 8. Details 1. Parapet edge detail 2. Internal rainwater outlet 3. Internal box gutter detail 4. Eaves detail, sloping roofs (gradients over 25 degrees) 5. Detail for inverted roof build-up 6. Index Intensive green roof system
- 15. Loading Capacity Calculate amount of weight roof can support. The weight of soil, decking, people and planters and where they are placed will all depend on the load bearing capacity of your roof. These ideas to reduce the load on your roof: Mix soil with organic and inorganic matter to lighten its weight, or use lightweight growing mediums, such as pre-mixed planting soils. • Plan for heavier items to be aligned with the building’s bearing walls, columns and shear walls, which have the added support of the footings below.
- 16. Drainage: • Keeping access to the drainage system free and clear I priority. • can be done on green roofs by maintaining a gravel ring and filter cloth layer around roof drains and overflow scuppers. • On rooftop gardens, ensure that any deck strapping or containers are aligned in such a way that they don’t block the flow of water to the drain. • Watch and determine where water flows to on your roof and ensure those areas and drainage paths are maintained roof is designed such to withstand pooling of water. • An added layer of protection should be provided (a drainage layer) over the roofing membrane to protect it from standing water that may collect from watering plants.
- 17. Maintenance: To maintain clear access to the roofing membrane a…. Drains for maintenance and repair, install rooftop garden in sections. This can easily be done using containers of any height or size, arranged in sections on roof. Designing rooftop garden in sections will avoid removing the entire garden area each time the roof needs some repair work. • Remember to factor in the weight of each container and its wet soil weight when designing the garden
- 18. Choosing plants: Gardening on a roof is quite different from gardening at gr level. Rooftops have unique and often extreme microclimates. The amount of sun and wind roof receives will have a direct effect on what will grow. For roof garden consider the amount of time and resources required for watering and maintaining plants, especially during the summer. Sun and Wind The height and location of building in relation to surrounding buildings can affect the amount of sun rooftop garden receives, as well as the exposure to wind. • Determine the wind and sun conditions on roof and select hardy plants that can flourish under the conditions rooftop garden provides your roof.
- 19. Soil depth Most plants can grow on a roof as long • they are provided with an adequate amount of soil stabilize and flourish. However, soil depth may be a limiting factor on some roofs. Make sure to study the depth of soil required for different species of trees, shrubs and wildflowers so as to match the right species with the conditions provided. • Availability of water – Watering during the summer months should be addressed in advance. • Summer is when the garden and plants need the most attention.
- 20. Other features A) Composting Before composting on a roof make su.. To have adequate drainage. • the roof should support the weight of the compost. • Rooftop structures should be tolerant of composted material, and maintenance. B) Seating-seating is an important consideration. Plan for seating when determining the load bearing capacity of roof. •containers can also function as seating areas as long as the fence or railing on roof still meets safety codes above the container height, or set containers and seating areas at least one meter (three feet) away from railings and roof edges.
- 21. Thank You