1. The 11-Wing Retractable Roof Engineering
Completed in 2020 by French engineering consortium VINCI and architect Didier Pasquier, the retractable roof over Court Philippe-Chatrier pays homage to the legendary French aviation pioneer Roland Garros. Composed of 11 individual electro-mechanically driven steel wings spanning 105 meters each, the roof glides silently across rails in approximately 15 minutes.
Each wing is sheathed in a translucent, waterproof polytetrafluoroethylene (PTFE) membrane that allows natural daylight to filter into the stadium bowl while preserving the strict moisture balance demanded by high-level clay court competition.
2. Anatomy of the Five-Layer Red Clay Surface
Contrary to common belief, "Terre Battue" (clay) is not simple natural red dirt. It is a precision-engineered 80-centimeter multi-strata geological filter designed to deliver controlled ball slide, high bounce friction, and rapid rainwater drainage:
| Geological Strata | Layer Thickness | Material & Function |
|---|---|---|
| 1. Surface Top Dressing | 1 - 2 Millimeters | Crushed red terracotta brick dust for sliding coefficient |
| 2. Binder Bedding Layer | 6 - 8 Centimeters | Crushed white limestone (Craie de Saint-Maximin) |
| 3. Clinker Layer | 7 - 10 Centimeters | Volcanic clinker residue for drainage permeability |
| 4. Crushed Gravel Sub-base | 15 - 20 Centimeters | Medium-gauge gravel beds |
| 5. Foundation Foundation | 40 - 50 Centimeters | Heavy stone drainage bedding with perforated conduits |
3. Night Session Illumination & Urban Integration
With the roof addition and high-intensity LED floodlighting fixtures mounted flush into the grandstand eaves, Roland Garros introduced evening sessions without generating excessive light pollution for the surrounding 16th arrondissement residential quarters and the Bois de Boulogne parkland.