John Cornacchia at Globacorp Developments International writes: A green roof system is an extension of the existing roof which involves a high quality water proofing and root repellant system, a drainage system, filter cloth, a lightweight growing medium, and grasses / plants. Green roof systems may be modular, with drainage layers, filter cloth, growing medium, and plants already prepared in movable interlocking grids, or each component of the system may be installed separately on site. Green roof development involves the creation of “contained” green space on top of a man-made structure. This green […]