In September 2013, the Barclays Center celebrated its first birthday. During its first 12 months open to the public, the Brooklyn stadium ranked first in the number of concert tickets sold in the U.S. and had an average attendance of 17,187 during Brooklyn Nets games (that's 96.9 percent capacity). Now the steel-clad fortress will make room for even more visitors.

The Barclays Center is getting a green roof with the help of architectural firm SHoP and developer Forest City Ratner. SHoP originally designed the stadium back in 2009, and they included plans for a green roof that were cut during development, according to the Wall Street Journal.

SHoP's green roof will span 13,000 square feet, replacing the white roof with a more appealing view for future apartments that are supposed to go up around the Barclays Center. "It's going to be a nice green surface to cast your eyes down onto," Chris Sharples, a partner at SHoP Architects, told the Wall Street Journal.

The roof also has the added benefit of dampening noise from concerts. Last year, Swedish House Mafia's performance bothered the neighbors so much that the Barclays Center had to pay a fine of $3,200. 

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