Consult a professional for help designing and installing a
green roof. It's important to first determine how much weight
your roof will hold to ensure that it can bear the load.
Resources:
Roofscapes, Inc., 7114 McCallum St., Philadelphia, PA 19119,
215-247-8784.
Soprema, Inc., 310 Quadral Dr., Wadsworth, OH 44281,
800-356-3521.
Roof Gardens: History, Design, and Construction by
Theodore Osmundson. Norton: New York, 1997.
Gardens in the City: New York in Bloom by Mary Jane
Pool. Abrams, New York, 1999.