GREEN ROOF GARDENING:

A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane.

A roof garden is a garden on the roof of a building. Besides the decorative benefit, roof plantings may provide food, temperature control, hydro-logical benefits, architectural enhancement, habitats or corridors for wildlife, recreational opportunities, and in large scale it may even have ecological benefits.

Why do we need green roofs?

Detail Of Rooftop Green Layers Placement

Plants reduce carbon dioxide in the atmosphere and produce oxygen. 

Green roofs reduce the heat island effect, which is the main cause of ozone production.

Plant roofs remove heavy metals, airborne particles and volatile organic compounds.

General Benefits:

1. Prolonging the service life of heating,ventilation,and HVAC systems through decreased use.

2.   Green roofs reduce the amount of storm-water runoff and also delay the time at which runoff occurs, resulting in decreased stress on sewer systems at peak flow periods.

3. Urban greening has long been promoted as an easy and effective strategy for beautifying the built environment and increasing investment opportunity.

4.   The use of recycled materials in the growing medium.

5.   Green roofs can also help reduce the distribution of dust and particulate matter throughout the city, as well as the production of smog. This can play a role in reducing greenhouse gas emissions and adapting urban areas to a future climate with warmer summers.

6.   The temperature moderating effects of green roofs can reduce demand on power plants, and potentially decrease the amount of carbon dioxide and other polluting by-products being released into the air.

7.   Green roofs help to reach the principles of smart growth and positively affect the urban environment by increasing amenity and green space and reducing community resistance to infill projects. Green roofs can serve a number of functions and uses, including:

• Community gardens (e.g. local food production or co-ops)
  
  
• Commercial space (e.g. display areas and restaurant terraces)
  
  
• Recreational space (e.g. lawn bowling and children’s playgrounds)
  

How much to average cost to implementation green roof garden in Pakistan?

It depend upon the space used to garden size of plants required and how much spending onto the rooftop  to look aesthetically appearance. An average cost of 10 Marla expenditure came is Rs: 75000 in Pakistan and additional cost you have spending that to it as your per requirement.