My wife Diane and I have completed our green roof in 2005/06. Although we had everything in place we didn?t plant anything for the first two years due to Diane becoming pregnant and the birth of our first child. Now that our daughter is 2 we have been able to finally get everything place. We have a roof with soil ranging from 5? to 15?. The dimensions are 20? x30?. We installed footers in our basement and ran pillar up through the house. The pillars support cross span supports we used to pick up additional roof weight.
The roof is made up with:
Firestone TPO membrane;A layer of non-woven geotextile material;A layer of medium sized expanded shale;Another layer of non-woven geotextile material;A layer of fine expanded shale;A fine layer of mushroom compost.We presently have grass, potatoes, pumpkins, zucchini, a couple types of squash, 30 various heirloom tomatoes, peppers, 4 types of basil, parsley, Dahlias, cone flowers, and black eyed Susans. We didn?t plant the traditional sedums because we wanted a garden and a place for our two year old to play. Our next goal is to develop underground cisterns to catch rain water for our irrigation requirements.