Frequently Asked Questions

How long does it take to open a retractable stadium roof?

Most modern retractable stadium roofs take between 12 and 20 minutes to fully deploy or retract. The speed is deliberately limited to ensure the massive kinetic forces generated by moving thousands of tonnes of steel remain safely within structural tolerances.

What happens to stadium roofs during a hurricane?

Stadium roofs are designed with extreme wind uplifts in mind. ETFE and PTFE membrane roofs often have specific failure points engineered into non-structural panels. If wind pressure exceeds a catastrophic threshold, these panels will blow out to relieve pressure on the primary steel frame, preventing total structural collapse.

How do synthetic roofs support snow loads?

The steep geometry and ultra-smooth surface of fluoropolymer materials like ETFE and PTFE cause snow to slide off rather than accumulate. Additionally, pneumatic ETFE cushions can be slightly depressurized to alter their profile, or heated air can be pumped through the internal structure to melt ice rapidly.

Why aren't all stadiums fully enclosed?

Cost, climate, and turf maintenance. Fully enclosing a stadium requires a substantially heavier superstructure and limits natural sunlight, which is critical for natural grass pitches. A tensioned, semi-translucent roof offers a balance, providing weather protection for fans while allowing the pitch to breathe.