The landscape possibilities with an Intensive Garden Roof® Assembly are virtually limitless. Intended for recreational, sporting and leisure purposes, they are often indistinguishable from at-grade landscapes.

An intensive assembly follows the same design concept as an extensive assembly; however, the Gardendrain® component has a taller profile and is filled with expanded aggregate to provide greater water storage and to support a greater depth of growing media.

The depth of the intensive growing media, which contains a greater amount of organic matter than an extensive blend, will generally dictate the type and size of plants that can be grown. Intensive designs usually consist of a mixture of hard and soft landscaping and incorporate plants that require regular maintenance, such as watering, fertilizing and mowing. The variety of plants possible is numerous, including sod grass lawns, perennial and annual flowers, shrubs, and even small trees. It is important, therefore, that the selected Gardendrain components can support any type of landscape from terraces and paths, to soil and trees, so as to permit excess water to drain unobstructed beneath.

When used in conjunction with Hydrotech's full line of hardscape elements, such as architecturally finished pavers and precast items, the system is ideal for roofs and plazas that will serve as pedestrian recreational areas.

Features of Intensive Garden Roof Assembly:

  • Depth of growing media between 150 mm and 900 mm
  • Unlimited design possibilities
  • Accommodates a wider variety of plants/shrubs/trees
  • Possibilities of hardscape options, site amenities and water features
  • Regular irrigation
  • Regular maintenance

Typical Application:

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 common to see water features, significant topography changes, trees and other large plantings that add character and interest to the roof.

Recent Press

  • November 26, 2019
    Palo Alto, CA. (November 26, 2019) There are many reasons to incorporate a green or living roof into a design, including energy conservation, water management, and financial benefits. For one project in Palo Alto, California, the benefits of having...
  • November 14, 2019
    WASHINGTON, D.C. (November 14, 2019) The Kennedy Center’s first expansion since its opening in 1971, the REACH is the John F. Kennedy Center for the Performing Arts’ historic, $250 million expansion project. A living memorial for President John F...
  • May 2, 2019
    CHICAGO, ILLINOIS (May 2, 2019) Very near Lake Michigan in Chicago, Northwestern Medical Center faced several challenges in bringing a new campus building to life. Designed by Perkins+Will, the project involves a phased construction where a 14-story...
  • January 25, 2019
    CHICAGO, ILLINOIS (January 25, 2019) The Ace Hotel is located in Chicago’s Fulton Market Historic District. It features 159 guestrooms and amenities including rooftop event spaces with stunning views of the city. The complex features several...
  • October 18, 2018
    American Hydrotech, a recognized leader in the vegetative roofing market, today announced the availability of the Fourth Edition of the company’s widely acclaimed Garden Roof® Planning Guide. For the last five years, updated print, online and app...
  • August 28, 2018
    Over the last two decades, the roofing industry has undergone some major changes, one of which is a growing recognition of the value of roof space other than keeping occupants warm and dry. Two veteran roofing professionals share their thoughts on...