Ode to the sun. SOMBRA pavilion

We are proud to announce our contribution to SOMBRA, a groundbreaking pavilion designed by MVRDV for the 2025 Venice Architecture Biennale. This innovative structure, situated in the Giardini Marinaressa as part of the "Time Space Existence" exhibition, serves as a dynamic homage to the sun, blending sustainable design with advanced material technology.

A Living Structure Inspired by the Sun

SOMBRA—derived from the Latin words sol (sun) and umbra (shade)—is a 30 m² pavilion that embodies the essence of passive kinetic architecture. Its six arched ribs, constructed from repurposed metal beams, are meticulously aligned with the sun's path, marking the angles of the summer and winter solstices. These ribs support a series of hinged, triangular panels made from perforated aluminum sheets, which respond to sunlight by opening or closing, creating a dappled shade beneath.

Alumet's Role in Material Innovation

At Alumet, we were entrusted with the anodization of the aluminum panels that form the pavilion's responsive façade. Our anodizing process not only enhances the durability of the panels but also imparts a luminous finish that interacts beautifully with sunlight. This finish plays a crucial role in the pavilion's ability to modulate light and heat, contributing to its zero operational carbon footprint.

Passive Kinetic Shading System

The pavilion's dynamic movement is achieved through a passive system developed by Airshade Technologies. Small air canisters within the ribs expand when heated by the sun, inflating connected airbags that gently close the panels. This mechanism, inspired by soft robotics, operates without any electronics or motors, exemplifying a sustainable approach to climate-responsive architecture.

A Universal Message

SOMBRA's design also carries a symbolic message. The circular floor features an engraved polar sun path diagram, while the underside of the arches displays the phrase "sun and shade" in over 200 languages, highlighting our shared relationship with the sun across cultures.