Holcim materials were used for the concrete masts, the wind diapason (with special aggregates, mix, and finish), the concrete walls (with a special smooth texture), the polished, random-cut concrete floors, and the large boulders in the central courtyard garden.
During the design phase the indoor climate of the north and south wings (those with the most occupants) was studied using a simulation program called ‘Comfort.’ The climate data used was obtained from the nearest meteorological station, located 8 kilometers north of the site. The studies provided information that was used to optimize the construction without changing the architectural design.
Response to the environment – especially solar radiation in the tropical climate of Costa Rica – was a prime consideration during the design phase.
The biggest improvement gained thereby was the reduction of thermal gain through the roof. To optimize the insulating performance of the roof, an assembly of ventilation, insulation, and shading layers was designed. Tensile structures shade the roof and the facades. Massive concrete walls insulate the east and west facades of the two wings. Without further scientific support, but based on the empirical knowledge of the geography and local climate, the drawings were finished and construction carried out.
Once the building was completed and occupied, it was necessary to reduce glare in certain rooms. This was done by tinting the glass. In some densely occupied rooms ceiling fans were installed to improve comfort. The central courtyard was landscaped using boulders that were left from the construction of the client’s nearby industrial plant.
The courtyard was planted with grass, ivy, and beach almond trees (T. catappa), which have a broad canopy, providing shade to reduce moisture loss. The microclimate of the courtyard can be further humidified and cooled with a misting system, which is activated every ten minutes for ten seconds, from 6 am to 6 pm on working days during the dry season. Plants are watered every morning and evening.