Post –by Gautam Shah
Shading devices in building occur as a screen, integrated or attached with the facade, withing the structural body and inside the building. Architecturally integrated solutions are permanent and well articulated. These, ones are however, perceived more as architectonic elements, and so may end up as partly inefficient appendages. Large number of architectural shading devices are conceived as an extension of the roof structure, like deep set of eaves. Architectural shades are often intentionally designed as screens, which serve limited functions but let the architectural entity be fully visible. Architectural Shading devices are part of the facade making and operate with depth as key character. The Depth also causes strong shadows forming its own language of 3D undulations during day time and this may pose a different image at night time, with internal illumination and external planned illumination or due to glow from street lights.
Single layer systems are single or multi functional facilities. The layer is usually mounted as a permanent addition, but some can be collapsed or removed for accessing the original opening treatment system. An opening treatment system is considered single layered when other layers are well distanced. Layer systems are plainer or have a substantial body so work by their extent, and thickness.
Multi Layered systems have several shading devices each of which or as combination are operative. Different layers occur together and often need to operate in unison or some strategy. Individual layers can be spread, collapsed or removed, but operation of a particular layer becomes difficult as direct access to it is blockaded by other layers. Multi layered devices are effective for the order of their position or sequencing. Each layer barricades not only the desired element but also affects role of other elements.
Additive systems are used as an optional or occasional facility. These are like beach umbrellas or awnings. These are temporary so no permanent structure is installed. There are two essential climatic variations. In cold climates the shading device is bottom opened like an awning to let sunlight warm up the floor but cut-off the eye level glare. Whereas in warm climates the shading device opens like hopper to direct the light towards the ceiling for diffused illumination and cut-off the bright eye level glare.
Collapsible or folding system requires a volumetric space for parking or resting, which reduces the nett area of opening.
Pseudo or pretentious shading devices are in the form of furniture elements, furnishings, panelling, partitions and other architectural devices.
Machines that manipulate the effects of opening systems.
Internal shading devices are predominantly of soft materials such as fabrics, films, sheets or stiffer materials such as reeds, slats, etc. Thin and pliable materials allow the assembly to collapse, gather or roll up. Glass surface treatments now make up a large set of internal method of modifying the openings and include application of films, texturing, metallizing, enamelling and colouring.
Shading devices as a facade making system often mask a building by an architectural regimen that seeks to control the lifestyle of users. The freedom to to relate to the outside world with the internal functions is lost. The choices when not available, the users alter the system by installing appendages. These extras are often seen on the outside, destroying the original intention of equalized facade elevation.