How to install faceted timber panels on a ventilated façade

The Tianjin Juilliard School By Diller Scofidio + Renfro

When installing timber panels on a façade, it’s essential to consider the material’s expansion and contraction because of changes in environmental humidity and temperature. In the case of complex geometries, the resulting angles and volumes require an additional level of precision: this is seen in the ventilated façade designed by Diller Scofidio + Renfro for the Tianjin Juilliard School, located in the Yujiapu Financial District, China.

This performing arts institution consists of four pavilions connected by five glass bridges. The design enriches the relationship between classrooms, practice rooms, and concert halls, linking them to the urban environment. The geometric complexity extends outward, featuring a faceted façade integrating natural timber panels, which creates a distinctive visual element that hints at the interior materiality. To accommodate the dimensional variations of the material without compromising the design’s integrity, expansion joints must be included between panels, and specific fastening systems should be used to allow the material’s movement.

Accommodating the dimensional movement of timber

Expansion movements caused by environmental factors affect all materials to varying degrees; for natural timber panels, these dimensional changes can vary between 0.3% and 0.6%. To ensure the proper functionality of the installation under these conditions, perimeter joints must be incorporated between the panels. The thickness of these joints depends on the panel size; for example, a 2.44 x 1.22 m panel requires a minimum joint of 8 mm.

The choice of fasteners is also crucial for enabling the panels to move freely. Screws or rivets should be centered on the perforations to accommodate dimensional variations and prevent restrictions that could generate tension. It is important to avoid using countersunk screws, as these block the necessary movement for the material’s expansion and contraction.

Fastening systems for natural timber façades

Parklex Prodema fastening systems are specifically designed to allow the contraction and expansion of timber panels in response to changes in temperature and humidity. This makes them ideal for complex geometries, ensuring the formal requirements of each project are met. Depending on the specific needs, façade panels can be installed with visible screws or rivets, or using hidden fastening systems. These hidden options include flush caps, nail systems, or elastic adhesives, which combine adhesive cords, double-sided tape, and primers.

Engineering solutions for rainscreen cladding systems

We have covered some key considerations for installing faceted geometry ventilated façades. For other related aspects, such as substructures, window and corner details, or curved solutions, Parklex Prodema offers a specialized engineering service. This service focuses on a detailed analysis of the façade, considering key factors like design features, aesthetic specifications, and the climatic conditions of the site. Our team collaborates closely with architects and designers to propose tailor-made solutions that guarantee both visual and technical precision.

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