Retractable roofs will be installed on both the Arthur Ashe and the Louis Armstrong stadiums at the National Tennis Center in Queens, N.Y., the U.S. Tennis Association announced. The roofs are part of a $550 million renovation of the facility. The roof at the Ashe stadium will be made of a Teflon-like fabric that is translucent, and will be supported by eight steel columns to address the arena's swampy soil, according to the New York Times.

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