Extensive roofs are typically lightweight and can be installed over a variety of structures including metal roof decks. Extensive roofs are not intended for recreational use and are typically used to minimize stormwater runoff and help reduce the “urban heat island” effect.
Thanks to Hydrotech’s Garden Roof® Assembly for sloped applications, architects are no longer limited to designing for flat green roof applications. Hydrotech’s Garden Roof® Assembly can be applied to sloping roofs with a pitch of 2:12 (9.5°) and greater using special engineering to accommodate shear forces and ensure soil and plant retention. For roof slopes greater than 3:12 pitch (14°), the GardNet® soil confinement system must be utilized.
A Garden Roof® Assembly can expand the livable space of a building through integration of hardscaped areas with lush landscaped areas of lawn and other vegetation. The maintenance required for these spaces is similar to the care that would be required to maintain this space at grade.
The landscape possibilities with an Intensive Garden Roof® Assembly are virtually limitless. Intended for recreational, sporting, and leisure purposes they are often indistinguishable from natural gardens in appearance. It is not uncommon to see water features, significant topography changes, trees and other large plantings that add character and interest to the roof.