Tour the Green Roof at Central Library! By Heather S on Jul 25, 2014 10:12 AM Do you know that the Milwaukee Public Library has 33,000 square feet of green roof above the Business and Periodicals Room? The green roof is engineered with moisture barriers and insulating features to reduce heating and cooling costs, minimize the urban heat island effect and protect the library underneath. The prime advantage of a green roof is its ability to absorb rainwater. Reducing storm water runoff lessens the load on MMSD sewers, lowers the risk of flooding and basement back-ups and reduces combined sewer overflows into Lake Michigan. The roof is planted with chives and Karl Forester Reed Grass and 12 varieties of sedum. MPL’s green roof project also includes photovoltaic cells that convert solar energy into direct current electricity. Visit MPL's Green Roof page to learn more and come to Central Library to enjoy an informative Green Roof Tour, offered Wednesdays at 12 noon and Saturdays at 10 a.m. through October. While at Central, check out our Green Ideas area on the 1st floor.