Green Rooftop
Green roof

In spring of 2012 the Shaw Nature Reserve built a green rooftop on top of its new bathroom near the picnic pavilions. First, the building was engineered to support the extra weight! You can’t just put a green roof on top of any building. The next step involved rolling out a protective layer of rubber liner. Then inter-locking rigid plastic trays were spread out over the entire area followed by a sixinch layer of soil that was hoisted onto the roof with a crane. The soil is a lightweight mixture of heat-expanded rock, compost and sand. In early May seed was hand sown. Seed had been kept cool and moist in a refrigerator for over two months to break seed dormancy. Germination occurred within one week followed by a light fertilizing three weeks later.