A roof garden is a type of garden on the roof of a building. Apart from decorative benefit, roof plantings can also offer food, maintain the temperature, hydrological advantages, architectural improvements, corridors for wildlife, and entertainment opportunities.
Humans have developed plants atop structures since antiquity. The ziggurats (an edifice devoted for special purpose) of early Mesopotamia (4th millennium BC–600 BC) had manifested trees and shrubs on the terraces. The best exemplification in Roman period was the Villa of the Mysteries in Pompeii, which displayed an elevated terrace where trees were planted. A roof garden was also found around an audience hall in Roman-Byzantine Caesarea. The medieval Egyptian place of Fustat had several tall structures that Nasir Khusraw in the early 11th century explained that it had 14 stories, with roof gardens on the top story along with ox-drawn water wheels for irrigating purpose.
Now-a-days roof gardens are generally witnessed in urban parts where there is limited place for cultivation of ornamental and edible plants. It can be completely decorative, for instance a landscaped garden that surrounds rooftop pools in high-rise and high class hotels. It can aid to its value by providing multiple variants of vegetables, fruits, and herbs.
Herb gardening can be done in your roof garden. This is almost similar to flower gardening or vegetable gardening. Such herbs are selected for cultivation that can be developed in square foot garden boxes or containers. Many herbs can grow at a considerable height. IT is advisable to think about their mature sizes before planting them. A small elevated garden box or container garden is ideal as it is moveable.
In roof gardening always lighter pavers, stones, and timbers are used so that it cannot be weighed down. Wood chips and crushed gravel are considered to be the ideal option for lighter flooring of roof garden.
Roof garden is done always in flat roofs with several areas of accessibility. The roof tops are strong enough to support heavier loads as the wet soil can add the weight of eighty or ninety pounds per square foot. In lighter rooftops roof garden can still be cultivated but it is done in bottles or containers which gives an entirely different architecture to the home.
The ceiling of the roof has waterproof membranes just to avoid water getting sip out of ceiling. The two generally used waterproofing elements are rubberized asphalt and thermoplastic sheeting.
Most importantly the climate of the area also plays a vital role in roof gardening. If the site is receiving sufficient sunlight and the roof is not getting obstructed by taller structures nearby then only the roof gardening is done.