Using the L-brackets, join together the outer sides of the green roof structure. Measure carefully and use the L-brackets to attach a 2m (6ft 6in) length of wood as a central support through the ...

Take a tour of the green roof atop WWF-US's headquarters in Washington, DC. Since 2010 this state-of-the-art, eco-friendly roof has been home to tens of thousands of plants, providing habitat for ...