linking the layers


Facade in prefabricated concrete elements:
- 2 layers of concrete (5cm each) with insulation in between hold together by reinforcement
- Attached to the slabs with a metal juncture: one part screwed onto the slab, the other part cast in the concrete element and then clipped to the first part

Two layers of glazing:
-Interior glazing: actual weather barrier, can be opened
-Exterior glazing: glass pane mounted with a gap between the pane and the concrete
-The exterior layer reflects a important part of the sunlight and serves as sun protection.
-The increase of temperature between the two layers of glazing produces an natural ventilation effect.

Glass panels:
-The exterior glazing can become larger and be placed on the exterior of the concrete facade forming a grid of panels.
-These panels can take a distance to the facade that allows a balcony in between.
-The panels are fixed 4-armed with metal beams attached to the slab and reinforced with a DuPont Sentryglass interlayer to increase their performance.

-The panels might change their materiality: Opaque elements as sun protection or photo voltaic panels.


The openings in the concrete facade are still placed by an algorithm that chooses a random position and one of four sizes for each window. The higher the floor, the more probable to get a large opening. These random  openings however stay in a rigid grid. This grid allows a compatibility with the layer of  glass panels, that sticks to the same grid. The algorithm also defines the location of balconies (at the moment the balcony positions correspond to first defined windows of type L). These balconies are used as starting points for the DLA algorithm that defines the placement of the glass panels.There are 3 types of panels: panels close to the concrete facade, panels distant enough to wrap a balcony and a third type in between. The panels that were first created by the algorithm are the most distant to the concrete facade. The spreading panels produce a distinctive image linking the different balconies.

Furthermore I added two new options to the VB function:
-You can choose if the algorithm works in 8 or in 4 directions (if panels the touch each other only at a corner are considered neighbors)
-Number of neighbors needed to stop the panel from moving (1 or 2)

These options allow to get a denser repartition of the panels with less branches.

GH screenshot

GH canvas

gh definition
vb code for perforated facade
vb code for panels


  1. Error: Unable to create directory /var/www/html/piraeus/wp-content/uploads/2019/06. Is its parent directory writable by the server? Trevor Patt says:

    I appreciate the level of detail you are investigating in joining the two layers of your facade system, but I feel like they are still only technically linked but are not interrelated. The project would be stronger if the two layers didn’t appear so independent of one another.
    detail sketch
    perhaps by defining the balcony space rather than simply the zone between layers it is a space that connects the two using the depth of the concrete panels, the structure, and the glass to produce more qualitative variation.

  2. eti says:

    Comment faire compliqué quand on peut faire simple !
    where is your mind ? Sofistication alias exprimentation doesn’t means lost in a parametric world ..Did you try to write a simple’s very difficult !
    Good luck !

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