Architect: EVR architecten
Client: ACV-CSC-Metea
Surface: 3161 m2
Timing: 2019 -2023
Status: Executed
Photographer: Sarah Blee
Advisors: Dexco, Brekelmans consultancy, Buro Kiss (stability), Istema (techniques, EPB), D2S (acoustics), Bureau Bouwtechniek (façade advice)
For the new building section, wooden slats will be used to create fixed shading for both the façade on the street side and those located in the inner area.
Based on a dynamic daylighting and shading study, we sought a sophisticated balance between daylighting, shading, direct exterior views and maintenance parameters to arrive at the right dimensions of the fins and grid sizes of the façade. The vertical deep wooden slats keep out direct sunlight, while the soft-white lacquered horizontal fins reflect diffused daylight deep into the offices.
Also by inclining the vertical louvres in different directions, the strongest peaks in daylight penetration can be smoothed out throughout the day. The wooden slats, composed of thermally treated boards in fsc pine, not only provide passive sun protection for the various office floors, but also give the building a rhythm and face full of character.
The position, size and orientation of the façade louvres was determined using a dynamic simulation, seeking an optimum between daylight penetration, external visibility and summer comfort control.
Our materials research matched the appearance of the façade to the required fire reaction class.
Given the large internal heat gains due to people and electrical equipment, a thermal comfort study maps solar gains through the façade. This involves simulating different variants for the wooden fins to gain an understanding of the impact of these variations. The size of the fins, spacing and direction are examined here.
In parallel, a daylight analysis is performed on the façade. The results were checked against existing standards. This study revealed a clear optimum in which daylight and cooling demand are optimised.
An additional study highlights the quality of outward visibility through the façade.
Material research
The search for suitable timber took into account parameters such as: cost price, durability class, treatability fire reaction class, tropical/local.
The advantages and disadvantages of different fire-retardant treatments were also examined in terms of cost price, maintenance, impact on detail and preservation of appearance.
