Ralph H. Johnson VA Medical Center, Charleston, S.C.
Retrofit Team
GREEN ROOF INSTALLER: Green Roof Outfitters Inc., Charleston
Materials
The 3,000-square-foot existing roof was covered with a modular green roof system. Pre-grown mats hold varieties of sedum. Chives, prickly-pear cactus and other perennials were added later.
GREEN ROOF MANUFACTURER: Green Roof Outfitters
The Retrofit
Construction took place on a weekend when traffic was lighter. A crane was used to load the material on the roof, including 4-inch-deep trays for the extensive modular green roof system and 2-inch-thick rubber pavers that were placed around the perimeter. For this project, a layer of 40-mil EPDM was placed on top of the existing TPO roof, upon which the modules were laid. Rubber paver walk pads, which are located along the outside to provide an attractive barrier and walking area for maintenance, have feet on the bottom for drainage.
Photos: Green Roof Outfitters