Envelope Intervention
An intervention in any of the 5 facades of a building

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What is an envelope intervention?
It is the type of intervention that takes place in one or several facades of a building, related to the altering of its exterior appearance or function, whether vertical facades or the rooftop, by adding or installing new alienated elements to its existing external envelope.
This typology has an immediate impact on the perception of buildings within the cityscape, and therefore a larger impact on the city than interior interventions. However, similarly to the interior interventions, the procedure also responds to a surgical or parasitic intervention, in this case revamping the external attributes of the building, changing completely the way it is perceived and used by citizens and passersby.
This tactical intervention is based on the colonization of the existing external surfaces of a building by coating or covering them or even by inserting alien objects, placed on top of them, providing aesthetical and programmatic benefits that can enhance the appearance, in the case of vertical facades, and even the functionality of the envelope, in the case of rooftops.