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

  • April 3, 2017
    Wind data is a critical issue to consider when building a new structure. An increase in the number of green roofs on buildings has driven a need for new wind design standards to be written for vegetative roofing assemblies. Richard Hayden discusses...
  • October 20, 2016
    (November 15, 2016) Richard Hayden, Hydrotech's Garden Roof Department Manager, will be speaking at the 2016 LED Specifier Summit and High Performance Building Forum. The design community continues to struggles with how to handle ever-increasing...
  • September 24, 2015
    (August 5, 2016) Excerpt from an article in Stormwater Magazine . With their myriad benefits, green roofs are becoming increasingly incorporated into new and existing projects. The International Green Roofs and Walls Project Database lists 1,599...
  • July 16, 2016
    (July 16, 2016) Excerpt from an article in Forester Daily News Green roofs – also known as vegetated or garden roofs – are key green infrastructure elements and are being increasingly recognized for their “valuable ability to absorb, reduce, and...
  • July 1, 2016
    CHICAGO, ILLINOIS (July 1, 2016) City Creek Center in downtown Salt Lake City, Utah, is one of the largest mixed-use urban developments built in the last 10 years. It's also one of the most innovative. Completed in 2012, the 23-acre project includes...
  • July 2, 2014
    American Hydrotech Inc. has released a free, interactive digital version of the company's popular Garden Roof® Planning Guide. The app – unveiled last week at the AIA Expo in Chicago – features pinch-to-zoom product photography, video animations, photo galleries showing Garden Roof® Assemblies in real-world applications, and design considerations.

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