Casa Leve, a pavilion at the Brazilian Architecture Biennial in São Paulo, explores timber structure and translucent membrane in an innovative project

The project investigates constructive lightness and flexible assembly through modular marine plywood components and a high-performance tensioned membrane roof

Part of the Brazilian Architecture Biennial (BAB), in São Paulo, Casa Leve, designed by the São Paulo–based studio H2C Arquitetura, explores a temporary architecture guided by efficiency of form and the precise use of materials. Inspired by structural patterns found in nature, the project adopts biomimetic principles to create a reciprocal timber structure in which each element supports the other and contributes to the overall balance. This structural logic results in a lightweight and precise system, capable of defining space through the direct relationship between skeleton and envelope.

Casa Leve’s structure is composed of small-scale marine plywood elements, designed to facilitate transportation, handling, and on-site assembly. Their reduced size and low weight allow each component to be carried individually and assembled by small teams, eliminating the need for heavy lifting equipment. In this way, the system responds to the demands of an ephemeral pavilion, conceived for rapid assembly, disassembly, and potential reconfiguration.

The choice of marine plywood is also linked to the efficient use of raw material, as it offers a high yield in the timber production chain, reducing waste and maximizing resource performance. The parametric development of the components and CNC fabrication, coordinated by H2C and Timbau Engenharia, ensure dimensional precision and enable each piece to actively contribute to the structural performance of the whole.

Above the reciprocal structure, the pavilion is enclosed by a high-performance tensioned membrane, Flexlight 502 S2, manufactured by Serge Ferrari and distributed in Brazil by Fratex, a project supporter. Translucent and highly resistant, the membrane acts as a continuous skin that wraps the space and establishes a transition between interior and exterior. It allows for curved surfaces that follow the organic geometry of the structure, filtering natural light and creating a luminous atmosphere within the pavilion.

The structure was assembled by Timbau, with specialized carpentry execution by its team, and installed within a park environment. The system is elevated off the ground, avoiding permanent interventions on the site. Ramps ensure accessibility and reinforce the reversible nature of the installation, which also features furniture pieces and an exhibition activation by Renault.

Casa Leve is thus defined by two main elements: the reciprocal timber structure, forming the skeleton of the space, and the tensioned membrane, shaping its skin. The articulation between these components establishes the architectural volume and creates a continuous and immersive environment, where material, light, and structure define the spatial experience.