Atop the Undergraduate Library is a rooftop terrace that features the building entrances, seating, and look down into the lower courtyard. This rooftop also has tree pockets built into the roof, that are supported by building infrastructure featured in the orginal plans for the building. The trees in these pockets make the terrace into a green roof for the UNdergraduate Library. They provide protection from direct sunlight and the evaporation of moisure off of plant material that can cool the buidling's rooftops and lowering energy costs from cooling while increasing the roofs lifespan. In the cold months, tree pockets like this can also acts as insulation and reduce heating costs.