Annotated Bibliography on "Green Roofs and Living Wall"

Annotated Bibliography 5 pages (1466 words) Sources: 8

[EXCERPT] . . . .

Green Roofs and Living Walls

The Future of Earth:

Living green has become a luxury for many people. Whereas in the past, living green was inherent to daily activities, as people relied upon non-technological means to advance, today, technology with all its improvements has made it easier for many to circumvent the system of safety in food, clothing, cosmetics, and other products. Thus, living green has become a sort of calling for those who can both afford it and who have time for it.

Yet this is a very important concept. As many toxins enter our bodies daily, green should be something that can help us combat those toxins. Yet in big cities, such as New York, Chicago, Atlanta, etc. this is impossible, as large buildings overtake gardens and other such potential "green" sources. For this reason it is especially important to have a discussion on green roofs and living walls with regards to big cities, as these could improve life for big-city dwellers.

Going green should not be a movement, it should be a way of life for all. As technology progresses, we must be aware that the ways in which we can all be green also expand.

We will most likely live on this Earth for a long time, and it is important to interact with nature to improve both the planet and our lives. According to a website that advocates for green roofs and living walls in Chicago, people all over the world "have understood the insulative nature of sod roofs, the ability to grow plants as part of 'living homes', and the symbiotic relationship between building materials and natural materials."

According to this Chicago website promoting green roofs, these facilities, could help save money in the long run because they keep buildings cool in warm climates and vice versa for buildings in cool climates. The site further details the usefulness of these in places like Iceland, the UK, Nova Scotia, Tanzania, and many other countries. To give a bit of historical context the site also discusses the Hanging Gardens of Babylon, an ancient wander that was admired for both its beauty and for water provisions for the ancient city in which it was situated. Based on this model, many 20th century architects attempted to incorporate this "green" into all their projects. Individuals such as Ricardo BoFill and Gunnar Birkerts, according to the same website, "designed buildings underground and with green rooftops."

In a world where technological advancement is so fast, it is possible to install these green roofs in all buildings, and though perhaps expensive at first, these efforts will surely pay off in the long run.

In order to examine green roofs further, however, one must note that there are different types. These can also help a building decide what kind of roof it wants. For instance, the two types are:

1. Extensive: according to Chicago Green Roofs, these host plants that are 2-6 inches, and are usually made of a mineral-based mixture of sand, gravel, crushed brick, leca, peat, organic matter, and soil. Plants that must survive in extensive green roofs must be hardy and self sustaining

2. Intensive: according to the same website, these green roofs are planted on a soil and grow medium (8-24 inches) plants. On these roofs, one can plant trees and shrubs of a variety, and create a more complex ecosystem, though irrigation system must also be installed.

Cost, however, as proven by the picture below, is also not too much more than that of a regular roof, which is an important fact to note.

From this simple table, one can note just how much longer, for instance, a green roof can last and how much cost savings it can allow the building to achieve. Thus, it is important to consider these green roofs despite their high initial costs, as potential money saving options in the long run.

Having discussed social and economic benefits, it is now important to also discuss what kind of plants the roofs can host, before moving onto living walls. Because green roofs, as well as walls, host a variety of strata, it is important to consider this to see what kind of plants they can sustain.

For instance, a green roof can have the following levels: deck of the roof, waterproofing material, root barrier, drainage layer, filter cloth, growing materials, and finally, plants.

For this reason there… READ MORE

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