04 février 26 [BACK] The 2025 Radome painting campaign

In 2025, the Radome, the iconic symbol of the Cité des Télécoms and the world’s largest unsupported inflatable sphere (50 meters high), underwent its eleventh makeover. This major project combined high-pressure cleaning with the application of paint to preserve this unique monument.

An innovative method to renovate the Radome

For the first time, several aerial work platforms, reaching up to 90 meters in height, were used to safely access the entire surface of the membrane.
The work was carried out from top to bottom, unlike previous methods, allowing for an efficient alternation between washing and painting.

The precise project schedule

The painting campaign took place from May 6 to June 26, 2025:

• Cleaning: May 6–28
• First layer of paint: May 7–June 13
• Second layer of paint: June 8–19
• Rewriting of panel numbers: June 23–26

Key figures of the painting campaign

• 4,300 liters of Hypalon 48 lead-free paint
• 1,725 liters of thinners
• 23,760 liters of waste water collected

A project supported by institutions

The Cité des Télécoms received support from the Brittany Region and the Regional Directorate of Cultural Affairs of the Ministry of Culture.
A valuable collaboration to ensure the preservation and enhancement of this unique monument.

Discover the Radôme during your visit

The renovated and gleaming Radome is now open to visitors. Take the opportunity to explore the Cité des Télécoms, its permanent and temporary exhibitions, and immersive journeys.
A must-see that will reopen onSunday, February 8, 2026!

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