Renovation of Montreal Olympic Stadium roof keeps original intention, says GMP Architekten

Montreal’s Olympic Stadium has been a landmark of 1976 Summer Games architecture, but its roof has been a persistent source of trouble. Decades of leaks, maintenance costs, and safety hazards from falling icicles have plagued the structure. Now, German architecture studio GMP Architekten is part of a team replacing the original membrane roof with a steel deck, aiming to solve the longstanding problems without discarding the original architectural intent.

The stadium, originally designed by French architect Roger Taillibert, features a distinctive inclined tower and a retractable membrane roof that was never fully completed as intended. Over the years, the roof has undergone several repair attempts, none of which fully resolved the technical issues. Icicles forming on the membrane surface posed a risk to pedestrians and the structure itself, leading to periodic closures and public frustration.

Por que importa

GMP Architekten was approached in 2018 to develop a durable solution. The studio’s approach focuses on a permanent steel deck that eliminates the membrane’s vulnerabilities while maintaining the silhouette and visual character of the original design. The project is a rare example of a major Olympic venue retrofit that prioritises both safety and heritage.

Key facts

Why the roof was a problem
The original membrane roof, made of a synthetic fabric stretched over a cable system, was intended to be retractable. However, technical difficulties meant the retraction mechanism was never fully functional. Over time, the membrane degraded, allowing water infiltration and causing icicles to form in winter. These icicles occasionally fell onto the stadium’s exterior areas, forcing the operator to cordon off sections and install protective netting. The roof also required frequent repairs, driving up operational costs.

Contexto

The steel deck solution
GMP Architekten’s design replaces the membrane with a fixed steel deck that is both lighter and more durable. The deck is engineered to shed snow and ice naturally, eliminating the icicle formation issue. The team retained the original cable system and tower connection to preserve the stadium’s iconic profile. The new roof is also designed to improve thermal insulation and reduce energy consumption, addressing long-standing complaints about the venue’s indoor climate.

Architectural intent preserved
The studio stated that the renovation respects the “original intention” of the stadium as a monumental, dramatic structure. Rather than altering the form, the steel deck is painted to match the existing colour scheme and follows the same curvature. The project demonstrates that solving functional failures does not have to come at the cost of architectural identity. For Montreal, the stadium remains a symbol of the 1976 Olympics, and the renovation aims to extend its useful life for decades.

What this means for sports architecture
The Montreal Olympic Stadium renovation is a case study in how major public venues can be retrofitted to meet modern safety and performance standards without losing their cultural significance. Many stadiums from the 1970s and 1980s face similar challenges with aging fabric roofs, and the steel deck approach could become a reference for other projects. For architects and urban planners, the project highlights the importance of early structural assessments and long-term maintenance planning in iconic buildings.

Source: Dezeen, “Renovation of problematic Montreal Olympic Stadium roof keeps ‘original intention’ in mind” — https://www.dezeen.com/2026/07/27/montreal-olympic-stadium-gmp-arcitekten-construction/