Roofs that can withstand hurricane-force winds will soon be installed on seven schools in Seminole County, Fla., under roof-replacement contracts worth more than $2 million. The design involves the use of wind valves that harness the force of swirling winds to keep the roof in place during storms. The resilience of a wind-vented roof has already been proven at the Miami International Airport. The valves can only be used on flat or low-slope roofs.
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