For the envelope I chose to combine shading elements with curtain walls to provide daylighting to the building without compromising its temperature, keeping it as fresh as possible on the sunny days. Since in Guayaquil is sunny most of the year, it is a little tricky to provide daylight without carrying the heat with it, however, the brise soleil is a great alternative for this purpose.
The 2nd foor is covered by curtain walls to take advantage of natural lighting, while the brise soleil will retain the heat gained. For all the exterior walls I decided to made them of 20 cm of CMU, plastering and reflective paint.
The floor of the 1st level is a combination of a concrete slab and an insulation layer to avoid heat transfer from the ground to the building.
All of the glass used in the building is the Low-E triple glazing Solarban 90 Starphire, set with the the RGB calculated for reflectivity 12.
As for the roof, the 2nd level roof is actually the floor of the 3rd level. It is an access to an exhibit space outside. I decided to make the 3rd level roof, a green roof made of layers of drainage, earth and grass on top of a concrete slab. These green roofs have an overhang of 2m towards the middle (where the 2 blocks meet), and towars the front to cover the terrace of the 2nd level; there was no need to extend the overhang on the back because there is no glass or terrace.
The 1st level has illumination in the rooms that need it the most like the lobby, conference rooms, gift shop and administration office. The rooms where the light does not reach are the storage, electrical room, restrooms, elevators and 2 offices. Although I might have to put some windows or skylight in the stairway areas.
The level 2 is well illuminated on both sides. The only rooms that does not have good lighting is the elevator lobby, restrooms and coffee shop on the right building, otherwise the natural lighting will be sufficient for the rest of the building. Since a great length of walls of the 2nd floor is glass, the brise soleil is extends to this floor to reduce the thermal conductivity like it does on the 1st floor.
The 3rd floor is also covered by natural lighting, with the exception of the 2 restrooms and the food preparation area in the left building. Since there is not too many openings for the daylight in this floor, a skylight was placed on each of the 3rd level's roof to illuminate the lobbies.