3.2.4 Analysis of green roof

3.2.4 Analysis of green roof The green roofs are inclined hills built on the top of stepped structure. This acts as a single plane rather than dividing that into horizontal and vertical planes, thus the transition between them is resolved by the greenery. At this rate the amount of soil used would be much larger, but it has been reduced by forming bulk of the inclined area with foam. This foam bulk massively reduces the weight of the structure above the roof that is soil. The soil layer is placed above the foam layer separated by the drainage layer made from plastic.

The soil used is an artificial inorganic lightweight soil made up of a naturally occurring amorphous volcanic glass, perlite, aluminium, potassium, many silicon dioxide and sodium oxides. The benefit of this soil is that it can retain water at higher rate and can be saturated as well when needed.

Figure 62- The building façade during summers. The building façade during autumn. Source- google

Figure 64- Sketch of the skylights present in the building due to the form of roof.

The pathway proceeding upwards in direction has been designed in zig-zag manner just as the same as the pathways are designed in contours landform. The pathway is surrounded by glass railing which reflects as water.

Skylight in the building has been placed on the riser of the step of the roof so that appropriate amount of sunlight enters the building. The structure system of the roof is made of truss so that it bears the load of the green roof above it. The skylight is made of material glass. It is fixed so that the water above the roof doesn’t enters the building in any manner.

Figure 65- Detail of wall section showing the relationship between the building and the greenery that flows over it. Source- (Velazquez, 2011)